Problem 7 Intro The table below shows the historical rates of return (including dividends) for two stocks: Year Stock A Stock B 2020 7% -3% 2019 12% 20% 2018 8% 20% 2017 4% -12% Stock A makes up 40% of the value of portfolio, and stock B makes up the rest. Calculate the portfolio return for each year. Attempt 1/3 for 1 pts. Part 1 What was the portfolio return in 2020? 4+ decimals Submit Attempt 1/3 for 1 pts. Part 2 What was the portfolio return in 2019? 3+ decimals Submit Part 3 Attempt 1/3 for 1 pts. What was the average annual portfolio return over all years? 3+ decimals Submit Part 4 Attempt 1/3 for 1 pts. What was the annual standard deviation of portfolio returns? 3+ decimals Submit