help pls. please show the calculation step by step for B) and C) . Thanks

(a) The following represents the information for two stocks, A1 and B2. Required: (i) Assuming you are forming a portfolio with a weightage of 70% in stock A1 and the rest in B2, what is the portfolio's expected rate of return? (3 marks) (ii) With reference to part (i) above, what is the portfolio's standard deviation? (10 mark5) (iii) What is the correlation coefficient of the portfolio? Given your answer, advise whether a portfolio comprising of these 2 stocks should be formed. (4 marks) (b) Use the following information to answer questions: Required: (i) What is the expected return on the market? (2 marks) (ii) What is the beta for a porffolio with an expected return of 14.8% ? (2 marks) (iii) What is the excess return of a portfolio with a beta of 2 and actual return of 17% ? (2 marks) (c) The standard deviation of Fords Corp, stock and the market are 18% and 11%, respectively. In addition, the correlation coefficient between the stock and the market portfolio is 0.86. Calculate and then comment on the beta of the stock. (4 marks) (d) Critically evaluate THREE (3) criticisms leveled against CAPM theory. (6 marks) (Total: 33 marks)