8. Consider the two (excess return) index model regression results for A and B: R = 1% +1.2RM R-square = .576 Residual standard deviation = 10.3% RB = -2% +.8RM R-square = .436 Residual standard deviation = 9.1% a. Which stock has more firm-specific risk? b. Which has greater market risk? c. For which stock does market movement explain a greater fraction of return variability? d. If r, were constant at 6% and the regression had been run using total rather than excess returns, what would have been the regression intercept for stock A?