please show your work

The following table contains the excess monthly returns for three companies and the market index. Required: Using the monthly excess returns above, calculate the stocks' covariance with the market and their betas. (Note: the covariance of the market with the market is just its variance.) (Use cells A5 to E40 from the given information to complete this question.) The following table contains the excess monthly returns for three companies and the market index. Required: Using the monthly excess returns above, calculate the stocks' covariance with the market and their betas. (Note: the covariance of the market with the market is just its variance.) (Use cells A5 to E40 from the given information to complete this question.)