8. Classify the following random variables as discrete or continuous: a. the number of traffic accidents occurs at a certain intersection per month. b. the proportion of people who respond to a certain mail order solicitation. c. the shelflives for bottles of certain prescribed medicine. d. the number of phone calls received by a switchboard during a five-minute interval. e. the weight of produce per acre.9. From a box containing 4 white balls and 2 red balls, 3 balls are drawn in succession, each ball being replaced in the box before the next draw is made. [5 points each] a. Find the probability distribution for the number of b. Find the mean of the number of red balls. red balls. Answer: Answer: c. Find the variance of the number of red balls. d. Find the standard deviation