QUESTION 8 Use the following historical returns of stocks A and B and answer the questions. Show the step-by-step calculation and circle your answer when you attach a file that shows the work. Then use your results from questions a, b, c, d and fill out the table for Mean, Standard Deviation (STDEV), Coefficient of variation (CV), and Portfolio. Question a: Calculate the average rate of return for stock A during the period 2013 through 2017. Year Stock A's Returns (%), PA Stock B's Returns (%), rB Portfolio (%) 2013 -18 -14.5 2014 33 21.8 2015 15 30.5 2016 -0.5 -7.6 2017 27 26.3 Mean STDEV CV Instruction: Do not round your result. Only enter a numerical value; do not enter any dollar, $, or % symbol. When you attach a file (part 2) showing your work, write down the equation that you need to use to solve this problem. Next, plug in all the given information. If you use an online calculator, give the link in your uploaded file). (express your numerical answer in percentage; for example, if you get 0.05, it should be expressed in percentage as 5%. Then you enter 5)