Excel Actovity: Evaluhteng Risk and Return data are adjusted to include devideruls interinediate calcalations, Use a minustign to enter negative values, if any. x2 capital gain or loss, and dividing the rebult by the beginning pnoe. Adsame that invidends are alreody inchuded in ithe indese. Aho, you caninot cafculute the fute in teturn for 2015 because you do not have 2014 data.) Round your annwers to twe decimal jiace. A Activity- Evaluating Risk and Retum b. Calculate the standard deviationk of the returms for Bartmon, Eeynoldt, and the Winslow S000. (14int: Use the sample standard diviation formula, which corr egponds to the STDev.S function in Excel.) Round your answers to twe decmal places. c. Cokculpte the coefficients of varivtion for Bartman, Revnolds, and the Window 5000. Round your answers to cwo decimal places. fhound your answess to four decolal places