Required Part 1 (30 marks) (a) The rate of return in each week for each stock and for the stock market index for the 2? weekly periods. Calculate the discrete rate of return as well as the condnuouslv compounded rate of return. Calculate the arithmetic mean return and the geometric mean return of each stock for the entire period. Use only the discrete returns for your calculations and for the calculations in the questions that follow. (it! marks) (b) The variance of returns for each stock and the index and the covariances of retlnns between each pair of stocks, the covariance between each stock and the stock market index, and the corresponding correlation coefficients. [5 marks}