Q2, Tony's Pizza guarantees all pizza deliveries within 30 minutes of the placement of orders. An agency wants to estimate the true proportion, p, of all pizzas that are delivered within 30 minutes by...

Q2, Tony's Pizza guarantees all pizza deliveries within 30 minutes of the placement of orders.  An agency wants to estimate the true proportion, p, of all pizzas that are delivered within 30 minutes by Tony's.  What sample size is needed for a 99% confidence interval for p to obtain a margin of error of 2%?