Which portfolio has had the highest average risk premium during the period 1900-2020? Government bonds Common stocks Treasury bills Cash Stock A has an expected return of 8% per year and stock B has an expected return of 24%. If 20% of the funds are invested in stock A, and the rest in stock B, what is the expected return on the portfolio of stock A and stock B? 16% 10.2% 20.8% 23.4% Spill Oil Company's stocks had -12%, 19% and 23% rates of return during the last three years respectively; calculate the average rate of return for the stock. 10% per year 9% per year 8% per year 11% per year