Use the table to answer each question. Note: Round z-scores to the nearest hundredth and then find the required A values using the table.

Question

The amount of time customers spend waiting in line at a bank is normally distributed, with a mean of 2.0 minutes and a standard deviation of 0.75 minute. Find the probability that the time a customer spends waiting is as follows. (Round your answers to three decimal places.)
(a) less than 2.5 minutes

(b) less than 0.5 minute