Rate of return, standard deviation, coefficient of variation Mike is searching for a stock to include in his current stock portfolio. He is interested in Hi-Tech Inc.; he has been impressed with the company's computer products and believes Hi-Tech is an innovative market player. However, Mike realizes that any time you consider a technology stock, risk is a major concern. The rule he follows is to include only securities with a coefficient of variation of returns below 1.14. Mike has obtained the following price information for the period 2015 through 2018: :: Hi-Tech stock, being growth-oriented, did not pay any dividends during these 4 years. a. Calculate the rate of return for each year, 2015 through 2018, for Hi-Tech stock. b. Assume that each year's return is equally probable and calculate the average return over this time period. c. Calculate the standard deviation of returns over the past 4 years. (Hint: Treat this data as a sample.) d. Based on b and c determine the coefficient of variation of returns for the security. e. Given the calculation in d what should be Mike's decision regarding the inclusion of Hi-Tech stock in his portfolio? Data table in order to copy the contents of the data table below (Click on the icon here into a spreadsheet.) Year 2015 2016 2017 2018 Stock price Beginning $14.64 $21.08 $64.66 $72.75 End $21.08 $64.66 $72.75 $91.12