Assume that Bob's golf scores, G, approximately follow a normal distribution with a mean of 77
and standard deviation of 4.5. Find the following probabilities.
a) P(G > 72)
b) What is the probability that Bob's score is between 70 and 75?
c) What is the probability that G is less than 79?
d) Find the value that marks the best 25% of Bob golf scores. (Remember that in golf better scores are lower.)