JAVA

A retail store has a preffered customer plan where customers can earn discounts on all their purchases. The amount of a customer's discount is determined by the amount of the customer's cumulative purchases in the store as follows: .When a preferred customer spends $500,he or she gets a 5 percent discount on all future purchases. .When a preffered customer spends $1,000,he or she gets a 6 percent discount on all future purchases .When a preffered customer spends $1,500,he or she gets a 7 percent discount on all future purchases .When a preffered customer spends $2,000 or more,he or she gets a 10 percent discount on all future purchases Design a class named PreferredCustomer,which extends the customer class you created in programing 4. The preferredCustomer class shoud have fields for the amount of the customer's purchases and the customer's discount level. Write one or more constructors and the appropriate mutator and accessor methods for the class's fields.Demonstrate the class in a simple program.