Suppose billingAmountis a doublevariable, which denotes the amount you need to pay to the department store. If you pay the full amount, you get $10.00or 1%of the billingAmount, whichever is smaller, as a credit on your next bill. If you pay at least 50%of the billingAmount, the penalty is 5%of the unpaid balance. If you pay at least 20%of the billingAmountand less than 50%of the billingAmount, the penalty is 10%of the unpaid balance; otherwise the penalty is 20%of the unpaid balance. Design an algorithm that prompts the user to enter the billing amount and the desired payment. The algorithm then calculates and outputs the credit or remaining balance. If the amount is not paid in full, the algorithm should also output the penalty amount.