8. An investor is putting together an investment portfolio, which will consist of three asset classes: U.S. stocks, U.S. bonds, and a money market account.The investor has projected the following key variables: expected return risk (standard deviation) U.S. stocks 14% 12% U.S. bonds 8% 7% money market 6% 4% The correlation between U.S. stocks and U.S. bonds is 0.40. The correlation between U.S. stocks and the money market is 0.22. The correlation between U.S. bonds and the money market is 0.70. Write out the formula (with the numbers filled in) to calculate the variance of the following portfolio: U.S. stocks: 60%; U.S. bonds: 20%; money market: 20%. You do not have to do the actual calculation. (8 points)