Problem 3. A recent study of the hourly wages of maintenance crew members for major airlines showed that the mean hourly salary was $20.5 with a standard deviation of $3.5. Assume that the hourly wages follow a normal distribution. If we select a crew member at random, what is the probability the worker earns: a. Between $20.5 and $24 per hour? b. More than $24 per hour? c. Less than $19 per hour