please show all the calculation and formula used.

(a) Raj, a fairly experienced retail investor, wants to invest $80,000 in the 2 following assets: (i) Calculate the expected retum and standard deviation for each asset. ( 8 marks) (ii) Raj wishes to invest $55,000 in ABC index fund and the remainder in Ditcoin. Given this, determine his portfolio's expected return and risk. (8 marks) (iii) Given your answer in parts (i) and (ii), should Raj invest in the portfolio or in individual assets? Justify your answer. (4 marks) (b) Critically discuss THREE (3) reasons why expected returns of an asset can diverge significantly from its actual return. (7 marks) Discuss TWO (2) reasons whether Ditcoin should be included in an investor's portfolio as part of his long-term asset allocation strategy. (6 marks)