Q5. You are considering two investment choices: a. 1 year CD that pays 2% for sure; b. investing in SP500 with 8% expected and 20% stdev. Q5c. You want to reach 15% mean return per year as a minimum....

Q5. You are considering two investment choices: a. 1 year CD that pays 2% for sure; b. investing in SP500 with 8% expected and 20% stdev.

Q5c. You want to reach 15% mean return per year as a minimum. What is the least amount you need to allocate to stocks? What is the stdev of the portfolio?