A Tim Horton's has recently opened up in Edmonton. It is observed that, on any given morning, the time it takes for a car to be served after ordering in the drive-thru follows a normal distribution...

A Tim Horton's has recently opened up in Edmonton. It is observed that, on any given morning, the time it takes for a car to be served after ordering in the drive-thru follows a normal distribution with ?μ = 6 minutes and ?σ = 2.4 minutes.
(a) What is the probability that it takes less than 5.5 minutes for a randomly selected car to be served after ordering? (Round your answer to four decimal places, if needed.)




(b) What is the probability that it takes more than 6.9 minutes for a randomly selected car to be served after ordering? (Round your answer to four decimal places, if needed.)