3. Please watch these videos: Normal Distribution and Z-scores (10:19) & Normal Distribution Table (5:43). Now, suppose that you have a stock with an average return of 12% and a standard deviation of 8 percent. Using the standard.normal table (Z-table) and your Z-score calculation answer the following questions: a. What is the probability of a return greater than 12 percent? b. What is the probability of a negative return? c. What is the probability of a return between 16 and 20 percent