One medical textbook states that only 6% of th human population has blood type O-Negative. Assume that a simple random sample of 45 people are selected.

A. Find the probability that 5 of the selected people have blood type O-Negative. Would this be considered unusual. Why or why not?

B. Find the probability that at least 4 of the selected people have blood type O- Negative. Would this be considered unusual . Why or why not?

I am trying to get the answer by using the VARS button on the calculator Can anyone walk me through it.