1) Data implies that the average annual salary of a Metro passenger is 60,000, with a standard deviation of 20,000.

a.With that distribution, compute the probability that a random passenger's salary is more than $90,000?

b.What range of salaries (please provide both the min and max) represents the bottom 25% of salaries for Metro passengers based on the given distribution?

Thank you so much! I would really appreciate the work shown so I can understand how to do this.