What is the expected return and standard deviation of a portfolio consisting of $ 6900 invested in a risk-free asset with an 7.8-percent rate of return, and $ 2300 invested in a risky security with a 19.8-percent rate of return and a 24.8-percent standard deviation?

16.80 percent, 18.600 percent

6.200 percent, 10.80 percent

10.80 percent, 6.200 percent

18.600 percent, 16.80 percent