please show a step-by-step explanation of how to solve the math problems under, What is the expected return and beta relation. The answers are at the bottom of the slide, I do not understand how to get to those answers.

Suppose that there are two economic factors, F1 and F2. The risk-free rate is 6%. The following are well-diversified portfolios: What is the expected return and beta relation? .31=.06+1.51+2.02.27=.06+2.21+(.2)2 So, 1=10% and 2=5%; the expected return and beta relation is: E(ri)=.06+.1bi1+.05bi2