2. Create a new class that calculates the sales tax on a purchase. (This should be similar to the BankAccount class) a. Create a class named SalesTax. b. You will need 4 instance variables: tax, purchasePrice, taxDue, and totalCost. The variable tax will hold the sales tax rate (as a percent value); purchasePrice will hold the price of the item purchased; taxDue wil hold the amount of tax for the purchased item calculated based on the sales tax rate, and totalCost will hold the purchase price plus the tax due. Think about what kind of data each variable will hold to determine what type the variables should be Create 2 constructors. The constructors should be patterned after BankAccount with a default constructor with the tax set to 0 and another constructor that sets the tax equal to the explicit parameter (argument) Create a method called calculateSalesTax. (This method should also be similar to deposit in the Bankaccount class) c. d. i. This method should accept as input the price of the purchase (a parameter variable called purchase)