Rate of return

1 The Standard Deviations and expected rates of return, r ^, r with a hat, are listed below for 5 stocks. Calculate the Coefficient of Variations for each. 

Stock              STANDARD DEVIATIONS              EXPECTED R OF R, r^         CV      

A                     5%                                                      20%                                        ____

B                     6%                                                      24%                                        ____

C                    7%                                                      28%                                        ____

D                    8%                                                      32%                                        ____

E                     20%                                                    80%                                        ____

2) Which stock is the riskiest stock? ____________

Explain