Create a class named as CarSalesman in package named dealer.personnel, with the following properties and methods:

int id

String name

double totalSales (for this specific salesman)

double totalComission(for this specific salesman)

All the attributes mentioned above should be private members.

Methods:

1.) a default constructor that initialize id = 0, name = , totalSales = 0, and totalComission = 0;

2.) a constructor with two parameters (id, name) and set the appropriate properties, and set totalSales = 0, and totalComission = 0;

3.) a method named makeSale(double amount), you will update totalSales and totalComission here.

4.) a method named querySale (it returns totalSales)

5.) a method named queryCommission (it returns totalComission)

Create a class named as CarSalesmanManager in package dealer.personnelmanagement with the following properties and methods:

1.) int numOfSalesman

2.) an array that is used to hold a group of salesman

Methods:

1.) a default constructor that initializes an array with 10 salesman

2.) a constructor with a parameter specifying the maximum number of salesman this manager can hold;

3.) a method named getSalesman(id), which returns a Salesman object whose id is as specified, if no such salesman exists, return null.

4.) a method named addSalesman(id, name), which adds a new salesman with the id and name information into the system; make sure that you will NOT add the new salesman in if a salesman with the same id already exists.

Now create a class named as ManagerTest in the default package (do not specify the package) to test your implementation.

The commission can be calculated by the following formula:

1.) If the sales amount (per sale, not the total sales amount) is smaller than 1000, no commission.

2.) If the sales is from 1000 to 2000, the salesperson will earn 5% of the amount that is larger than 1000.

3.) If the sales is larger than 2000, the salesperson will earn 50 plus 10% of the amount that is larger than 2000.

For example, if a salesman sells an item for $700, he earns 0 commission.

If he sells an item for $1400, he will earn (1400 1000) * 5% = 20

If he sells an item for $4000, he will earn 50 + (4000 2000)*10% = 250