show all work using formulas please

Instructions: Show all of your work for maximum credit using the formulas. There are 25 points possible. 1. Given the following historical returns for Dunphy Electronics (DE) stock and the S&P500 (market index), DE() S&P500 (r.) Yr 1 Yr 2: Yr 3 Yr 4 28% 17% -12% 23% 18% 12% -6% 5% Turs 7.25% 10.31% 0 a) (8 points) calculate the Average return and standard deviation for DE. b) (13 points) Calculate the covariance and correlation coefficient between DE and the market's returns. c) (4 points) Calculate DE's beta