Draw an activity diagram that models the following scenario for a point of sale system. [15]
the sales clerk enters item codes until all the customer’s purchases are recorded
the subtotal, taxes and total amount due are calculated
the customer can choose to pay with cash or a credit card
if the customer chooses to pay by credit card, a credit check is done
if the customer’s credit card is declined or the customer has insufficient cash, the sale is voided
if the customer can pay, the payment is recorded and a receipt is issued to the custome