Question: A study by the NGF reports that the 6.2 golfers over the age of 50 spend an average of $939 on golf during the previous year. Assuming a normal distribution with a standard deviation of $200, what is the probability that a randomly selected golfer in this age group will have spent:

a. More than $1539

b. Between $939 and $1339?

c. Less than $1139?

d. Between $539 and $1139?