Draw a class diagram for an order processing system. An order consists of a number of order items.

Each order item has the attributes of product id$,$ quantity, unit price and subtotal for the order. An

order will be shipped to the customer$$s address. Each customer address is composed of three lines

of string. The order may be paid by a cheque or a credit card. A cheque is identified by its cheque

number. A credit card payment can only be processed if we know the card type $($Visa$,$ MasterCard,

etc.$),$ card number, card holder$$s name, card identification number and expiry date. The class

diagram should show appropriate data attributes including but not limited to the ones mentioned in

the question. You are not required to specify the data types for the attributes. You don$$t need to

show the operations of the classes in the diagram. The diagram should contain an inheritance

relationship and a whole$-$part relationship. Also specify appropriate multiplicities on the

associations.