Please use excel functions. ex: b2/b1

Part A. What is the bi of the stock? Maret portfolio's expected returne(rm) The asset's expected return E(ri) The risk-free rate rf 20% 15.33% 6% Bi 0.666 Part B. What is the returnof the risk-free asset? The asset's expected return E(r) 0.15 Maret portfolio's expected return(rm) 19.30% Bi 0.8 rf