The time it takes Pizza Palace to make an order for delivery (not including the delivery time) follows a bell-shaped curve with a mean of 15 minutes and a standard deviation of 1.25 minutes. (a) What percent of orders are ready between 13.75 minutes and 18.75 minutes? (b) What percent of orders are ready between 12.5 minutes and 13.75 minutes? (c) What is the cutoff for the slowest 2.5% of completion times?