You have included the following securities in your investment portfolio: Security Investment Last Years Beta Details Amount Return Value A $4,000 6.2% 0.95 B $7,500 4.8% 1.48 C $8,200 7.1% 1.11 D $5,300 5.9% 0.68 Required: a) Calculate the expected return of the portfolio assuming that investment returns are likely toremain relatively stable. (3 marks) b) Calculate the beta of the portfolio. (2 marks) c) Briefly comment on how your investment portfolio is likely to perform in the following year where the expectations are now unfavourable for positive returns in investment markets