Please help. I'm not sure how to solve these. In a large corporation, the times that it takes its employers to commute from home to office are normally distributed with a mean commute time of 29 minutes and a standard deviation of 7 minutes. Using this information, answer the following questions.

What is the probability that a randomly selected employee will take less than 20 minutes to commute to work?

If an employee can drive to work in 37 minutes, at what percentile would his commuting time rank?

What percentage of the employees take between 25 and 45 minutes to drive to work?

If an employee drives an hour to get from home to work, is that considered an unusually long commute?