33 Time left 2:56:54 This question is worth 5 marks. Please show any formulas that you are using and calculations, od out of a) Explain what is meant by standard deviation is at pertains to an investment portfolio (3 marks), b) Why is calculated differeatly for portfolio than an individual asset? (1 marks) c) Why can standard deviation not be used as the only measure to rank how good a stock or a portfolio of stock would be as an investment? (1 marks) n A B 1 op c