I just need help with B.

68. The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of about ten. Suppose that 16 individuals are randomly chosen. Let X = average percent of fat & calories. a. X ~ ( ' ) . b. For the group of 16, find the probability that the average percent of fat calories consumed is more than ve. Graph the situation and shade in the area to be determined. c. Find the first quartile for the average percent of fat calories