At this level, your program will have some basic classes with specifications as below. You may need

o define methods wherever appropriate to support these classes. At the end of the PASS level, your program should be able to run with a menu described in the class Operations.

Customers:

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

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$(14\mathrm{.}8100\%)=15.$

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.

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 $308\%=2\mathrm{.}4$$$,$ the total cost after the discount is $27\mathrm{.}6$$$,$ and thus, the

reward is round$(27\mathrm{.}6100\%)=28.$

The class VIPCustomer should have the following components:

i$.$ Appropriate attributes to support the reward rate and discount rate 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:

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 $($for VIP customers$),$ and the reward. The method list$\_$products will display the product

ID$,$ product name, and the unit price. Note the two methods can be used to validate the

reading from the two $.$txt files associated with the customers and products.

NOTE you are allowed to add extra attributes and methods in this class if these attributes and

This class has a method named read$\_$customers. This method takes in a file name and