Rate of return, standard deviation, coefficient of variation Penonul Finance Protiem Mike is searching for a stock to include in his cunent stock portlolio. He as interented Mike has obtand the following price information for the period 2015 through 2018 : c. Calculate the standird doviation of returns over the past 4 youn (Hent Treot this data as a samplo) d. Bresed on b and e determine the coeficient of variation of roturn tor the pecunty. e. Given the calculation ind what should be Mike's docition roganding the inclistion of HETech stock in his portolio? a. The rate of return for year 2015 is K. (Round to two decinsal plasis) Data table (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.)