Suppose Tommy is a delivery driver for Jed's Crispy Pizza Junction. It is known that the time it takes to deliver a pizza has a uniform distribution from twenty minutes to sixty minutes.

a. What is the probability that the time to deliver a pizza is less than thirty-five minutes?

b. If the time to deliver the pizza is longer than fifty minutes, the customer will receive $5.00 off the price of the pizza. What is the probability that the customer will receive $5.00 off the price?