b) The market is expected to generate a 11% return and the risk free rate is 4%. A portfolio manager has 80% of her capital allocated to stock A with a beta of 0.9, which generated a total return of 12%. 20% of her capital is allocated to stock B with a beta of 1.3, which generated a total return of 13%. What concept is demonstrated to explain the alpha being generated by the manager? (10 marks)