During one year the wait time at a Tim Horton's drive was timed. The distribution of wait times follows a normal distribution with a mean of 7 minutes and a standard deviation of 3 minutes for that year.

a) What is the probability that you will use the drive through at the Tim Hortons and your wait time is between 5 and 8 minutes?

b) What percentage of the year will your wait time be more than 9 minutes? How many days is that?

c) What is your wait time in line if your time was 0.65 standard deviations below the mean of 7 minutes?

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