need help with equations NOT excel

possible. structions: Show all of your work for maximum credit using the formulas. There are 25 points (market index), Given the following historical returns for Campbell Technology (CT) stock and the S&P500 CT (1) S&P500 (m) rang Yr 1 Yr 2: Yr 3 Yr 4 Tavg 35% 10% -15% 23% 28% 12% -13% 8% 8.75% 16.88% a) (8 points) calculate the Average return and standard deviation for CT. b) (13 points) Calculate the covariance and correlation coefficient between CT and the market's returns. c) (4 points) Calculate CT's beta