A researcher studying frogs is investigating the distance that a certain species of frog can jump. the jump lengths appear to be approximately normally distributed with a mean of 90 inches and a standard deviation of 8 inches.

a) What proportion of frog jumps are less than 74 inches?
b) What jump lengths represent the middle 95% of frog jumps?
c) What is the probability of observing a random frog jump that is longer than 98 inches?