RR= have free Rated 3. You have been assigned the task of estimating the expected returns for three different stocks: QRS, TUV, and WXY. Your preliminary analysis has established the historical risk premiums associated with three risk factors that could potentially be included in your calculations: a proxy for the market portfolio (MKT) and two variables that capture general macroeconomic exposures (MACROI and MACRO2). These values are 2.MKT - 7.5%, MACROI = -0.3%, and MACRO2 = 0.6%. You have estimated the following factor betas for all three stocks with respect to each of these potential risk factors. - 7.5 0.3 6.6 Stock | MACRO1 MACRO2 ORS 1.24 -0.42 0.00 TUV 0.91 0.54 0.23 WXY 1.03 -0.09 0.00 a. Calculate expected returns for the three stocks using just the MKT risk factor. Assume a risk- free rate of 4.5%. b. Calculate expected returns for the three stocks using all three risk factors and the same 4.5% risk-free rate