a$)$Fill in the missing values in the table.

b$)$Suppose you believe that the CAPM is the right model for the expected return. Is the expected return of firm A correct in the table? Suppose you purchased stock A expecting expected return of $10\%.$ Suppose also that all the future forecasts remain the same. Based on the correct expected return calculated from the CAPM, you will buy more of stock A or sell it$?$ Explain.