Suppose that the mean length of time employees working in a large city spend commuting to and from work each day is 78 minutes with a standard deviation of 12 minutes. a) If a person employed in this city is randomly selected, what is the probability he spends more than 80 minutes commuting each day? b) If a sample of 48 employees in this city is taken, what is the probability that their mean daily commute time is less than 75 minutes? c) If a sample of 48 employees in this city is taken, what is the probability that their mean daily commute time is more than 80 minutes? (this is different from a) Only 1A and 1B and 1C needs to be answered