Mr Ali recently met with one of his clients. Mr Ali invests in a list of 30 stocks drawn from several industries. At the meeting, his client made the following comment: I trust your stock picking ability, but why invest in 30 stocks when you have strong opinions only on few of them? Mr Ali plans to response to his client within the context of modern portfolio theory. (a) Explain the concepts of systematic risk and firm-specific risk, and give an example of each type of risk. (b) Comment on the clients statement. Discuss how both systematic and firm-specific risk change as the number of securities in a portfolio is increased.