3 {Mandatory} {? points] v' Saved According to Investment Digest ("Diversification and the Risk!\" Reward Relationship", Winter 1994. 13}, the mean of the annual return for common stocks from 19%!) to Hit? was 16.5%. and the standard deviation of the annual return was 19%. a. What is the probability that the stock returns are greater than 0%? b. What is the probability that the stock returns are less than 18%? What is the area between the mean and our actual score