please link up with some reference

Clients Financial Questions: (25 marks) I Your client considered investing in either debt securities or equity securities and would like to know what are the main characteristics that distinguish the return on debt securities from the return and on equity securities? (12 marks) Why does the yield change through time but the coupon rate does not? (4 marks) The total risk of an individual share comprises both systematic and unsystematic risk. Explain both of these risk components and describe how each is affected by increasing the number of shares in a portfolio. (5 marks) Your client is unsure why are investors focused on market risk only when applying the Capital Asset Pricing Model (CAPM) to price risky securities? (4 marks)