What is the covariance? Please show all work on excel

Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 2.0% + 0.40 RM + EA RB = 1.8% + 0.90RM + eB OM = 15%; R-square A = 0.30; R-squarep = 0.22 What are the covariance and correlation coefficient between the two stocks? (Do not round intermediate calculations. Calculate using numbers in decimal form, not percentages. Round your answers to 4 decimal places.) & Answer is complete but not entirely correct. Covariance 0.5477 X Correlation coefficient 0.2570 Suppose that the index model for stocks A and B is estimated from excess returns with the following results: RA = 2.0% + 0.40 RM + EA RB = 1.8% + 0.90RM + eB OM = 15%; R-square A = 0.30; R-squarep = 0.22 What are the covariance and correlation coefficient between the two stocks? (Do not round intermediate calculations. Calculate using numbers in decimal form, not percentages. Round your answers to 4 decimal places.) & Answer is complete but not entirely correct. Covariance 0.5477 X Correlation coefficient 0.2570