One of the biggest challenges in investing is to come up with the expected future return on a security. During this semester, we introduced the Capital Asset Pricing Model (CAPM) as one tool to determine a security's expected return. Imagine you're in a job interview with a portfolio manager at Fidelity or Black Rock and they ask you whether they should be using CAPM for their funds. Please explain the advantages and disadvantages of portfolio managers using CAPM to price securities