Refer to the table below:

(a) Calculate the monthly excess returns of the Share index and Share A. (b) Add a graph of the excess returns of Share A on the vertical axis (Y axis) and the Share index on the horizontal axis (X axis). On this graph, plot the linear regression line and display the regression equation and the R-squared. (c) Using appropriate Excel functions to calculate the Alpha, Beta and R-squared of the regression of the excess returns of the Share index on the excess returns of Share A. Provide a brief explanation on what these quantities measure. Rates of return End of month Share index Share A Risk-free Jul-19 -1.710% 4.786% 0.442% Aug-19 3.337% -0.627% 0.436% Sep-19 0.023% 0.076% 0.452% Oct-19 1.799% -0.799% 0.413% Nov-19 0.141% 0.316% 0.450% Dec-19 0.028% 3.806% 0.449% Jan-20 -2.544% 4.211% 0.384% Feb-20 -2.105% -4.441% 0.445% Mar-20 -4.611% 4.062% 0.387% Apr-20 -3.200% 2.082% 0.453% May-20 -6.108% 1.839% 0.366% Jun-20 7.443% 0.132% 0.308%