QUESTION 13 Over the past 4 years an investment returned 0.1, 0.12 -0.08, and 0.13. What is the standard deviation of returns? (Note: input raw results with four decimal digits, NOT percentage results. For example, input 0.0102 NOT 1.02%) QUESTION 14 After learning the course, you divide your portfolio into three equal parts (.e. equal market value weights), with one part in Treasury bills, one part in a market index, and one part in a mutual fund with beta of 0.77. What is the beta of your overall portfolio? QUESTION 15 What is the Net Present Value of the following cash flow streams at an interest rate of 8.25% at year 0: 50; year 1: $75; year 2: $225 year 3: $0; and year 4 $300. S