Determine whether the value is a discrete random variable, continuous random variable, or not a random variable.

a. the amount of rain in city upper b during april

b. the exact time it takes to evaluate 27 plus 72

c. the eye color of people on commercial aircraft flights

d. the distance a baseball travels in the air after being hit

e. the number of textbook authors now sitting at a computer f. the number of points scored during a basketball game