5.100 An investment portfolio in Singapore specializes in airline stocks and contains two of them. One is Singapore Airlines (mean: 0.12; standard deviation: 0.02), and it accounts for 30% of the portfolio shares. The other airline present in the portfolio is AirAsia (mean:

0.25; standard deviation: 0.15), a higher-risk, higherreturn investment.

a. What is the expected value and the standard deviation of the portfolio if the coefficient of correlation of the two stocks is 0.5?

b. What will they be if the correlation is 0.2 instead?