Customers:$1.$ Class Customer$$Each customer has a unique ID$,$ unique name $($a name will only contain alphabet characters$).$ Each customer also has some reward points. You are required to write the class named Customer to support the following:$$i$.$ Attributes ID$,$ name, and reward$$ii$.$ Constructor takes the values of ID$,$ name, and reward as arguments$$iii$.$ Appropriate getter methods for the attributes of this class$$iv$.$ A method get$\_$reward which should be an empty super method$$v$.$ A method get$\_$discount which should be an empty super method$$vi$.$ A method update$\_$reward which should be an empty super method$$vii$.$ A method display$\_$info which should be an empty super method$2.$ Class BasicCustomer$$All Basic customers have a flat reward rate when making a purchase $($i$.$e$.,$ all Basic customers have the same reward rate$).$ By default, the flat reward rate is $100\%.$ The class BasicCustomer should have the following components:$$i$.$ An attribute for the reward rate$$ii$.$ Constructor takes the appropriate parameters$/$arguments$.$iii$.$ Appropriate getter methods for the attributes of this class$$iv$.$ A method get$\_$reward which takes the total cost and returns the reward. Note, the reward is always rounded. For example, when the total cost is $14\mathrm{.}8$ and the reward rate is $100\%,$ then the method will returns the reward which is round$(14\mathrm{.}8$ x $100\%)=15.$v$.$ A method update$\_$reward which takes a value and increase the attribute reward with that value.$$vi$.$ A method display$\_$info that prints the values of the BasicCustomer attributes.$$vii$.$ A method set$\_$reward$\_$rate to adjust the reward rate. This method affects all Basic customers.$3.$ Class VIPCustomer$$A VIP customer not just receives the reward but also gets a discount for the purchase. The reward rate is the same for all VIP customers and has the default value of $100\%.$ On the other hand, the discount rate is different among VIP customers. If not specified, the discount rate is set as $8\%.$Note that the reward is computed after the discount. For example, with a reward rate of $100\%$ and discount rate of $8\%,$ if a VIP customer makes a purchase with the original total cost of $30$$$,$ then discount will be $30$ x $8\%=2\mathrm{.}4$$$,$ the total cost after the discount is $27\mathrm{.}6$$$,$ and thus, the reward is round$(27\mathrm{.}6$ x $100\%)=28.$The class VIPCustomer should have the following components:$$i$.$ Appropriate attributes to support the reward rate and discount rate$$Page $4$ of $13$RMIT Classification: Trusted$$ii$.$ Constructor takes the appropriate parameters$/$arguments$$iii$.$ Appropriate getter methods for the attributes of this class$$iv$.$ A method get$\_$discount which takes the total cost and returns the discount offered$$v$.$ A method get$\_$reward which takes the total cost and returns the reward$$vi$.$ A method update$\_$reward which takes a value and increase the attribute reward with that value.$$vii$.$ A method display$\_$info that prints the values of the VIPCustomer attributes$$viii$.$ A method set$\_$reward$\_$rate to adjust the reward rate. This method affects all VIP customers$$ix$.$ A method set$\_$discount$\_$rate to adjust the discount rate of each individual VIP customer$$Products:$4.$ Class Product$$This class is to keep track of information on different products that the pharmacy offers. This class supports the following information:$$ ID: a unique identifier of the product$$ name: the name of the product $($you can assume the product names are unique and they do not include any digit$)$ price: the unit price of the product$$ A method display$\_$info that prints the values of the Product attributes$$ Extra attributes and methods if you want to define$$Orders$5.$ Class Order$$This class is to store a customer's purchase information. This class supports the following information of an order:$$ customer: the one who makes the purchase $($can be a Basic or VIP customer$).$ You need to think$/$analyse carefully if this should be an ID$,$ name, or something else.$$ product: the product of the purchase. You need to think$/$analyse carefully if this should be an ID$,$ name, or something else.$$ quantity: the quantity of the product ordered by the customer$$ A method compute$\_$cost that returns the original total cost $($the cost before the discount$),$ the discount, the final total cost $($the cost after the discount$),$ and the reward. For example, if the original total cost of an order of the customer Tom $($VIP customer with reward rate of $100\%$ and discount rate of $8\%)$ is $30,$ then this method will return $(30,2\mathrm{.}4,27\mathrm{.}6,28).$ Extra attributes and methods if you want to define.$$Records$6.$ Class Records$$This class is the central data repository of your program. It supports the following information:$$ a list of existing customers $$ you need to think what you should store in this list $($customer ID$,$ customer name, or something else?$)$ a list of existing products $$ you need to think about what you should store in this list $($product ID$,$ product name, or something else?$)$Page $5$ of $13$RMIT Classification: Trusted$$ This class has a method named read$\_$customers. This method takes in a file name and then read and add