You run a regression of a stock's excess return on the market's excess return. The resulting equation is: y = 0.6x +0.05, and the R-squared is 0.48. (a) On average, how much did this stock price change if the market rose 1%? (b) What is the proportion of this stock's risk that is firm specific? (c) What does this model say is the stock's expected return when the market is 0%? IF using Excel, please show all steps.