### Access time to a supercomputer mainframe is normally distributed with an average(mean) of 92 minutes a day with standard deviation of 11 minutes.

Please use Excel when necessary: Access time to a supercomputer mainframe is normally distributed with an average(mean) of 92 minutes a day with standard deviation of 11 minutes. Find the probability that on a certain day, the access time is: a) Less than 60 minutes b) More than 100 minutes c) Between 70 and 90 minutes