This question below

four listed companies Green plc, White plc, Gold plc and Brown plc: Company Beta Expected Rate of Return {per annum) indicated by current market price -_ 105% White pIc Gold plc Assume the riskfree rate is currently 3%, the market premium is 8% and there are no transaction costs. a. Indicate which shares investors should buy and which they should sell. Justify your recommendations. (10 marks) b. Explain why investors would need to act quickly on your recommendations? [5 marks) c. If we assume the riskfree rate is 1.5% (but all other values remain the same), how does this affect your earlier recommendations? (5 marks) d. In the context of the Capital Asset Pricing Model, explain (i) what beta tells us about a share, (ii) how we might estimate beta and (iii) how a share's beta is related to the concept of systematic risk? (10 marks)