1 pts Question 31 In the past three years you made 22%, 8% and 13%. What is the standard deviation of your returns? 13.1% O 7.09% 6.2% 08.03% O 9.6% 1 pts Question 19 For the next 7 years you will get cash flows of $50 at the end of the year. The initial investment is $320. From this investment, what is the rate of return that are you expecting? 1.27% O 2.29% O 7.28% 09.06% 0 3.21% 1 pts D Question 18 Time Atte 11 You and your brother Peter got a $110,000 30-year fixed-rate mortgage at 8.5%. While you will obtain a 30-year mortgage, you plan to prepay the mortgage by paying an additional amount per month with your regular payment. What is the additional amount that you must pay per month if you want to pay off the mortgage in 15 years. 24 E $23741 $200.00 O $199.87 O $253.25 O $215.83