I don't know if this is allowed or not but please help

Do the following . Create an abstract class DiscountPolicy. It should have a single abstract method computeDiscount that will return the discount for the purchase of a given number of a single item. The method has two parameters, count and itemCost. Derive a class Bulk Discount from DiscountPolicy. It should have a constructor that has two parameters, minimum and percent. It should define the method computeDiscount so that if the quantity purchased of an item is more than minimum, the discount is percent percent. Derive a class BuyNitemsGetOneFree from Discount Policy. It should have a constructor that has a single parameter n. In addition, the class should define the method computeDiscount so that every nth item is free. For example, the following table gives the discount for the purchase of various counts of an item that costs $10, when nis 3: UM Blogrom Count 12 3 4 5 6 7 Discount 00 10 10 10 20 20 Discount Policy computerscount coure irrecon fon)How Buy One Bund Byen Dent ce