i need help with those 3 please!

the last QUESTION is TRUE OR FALSE

Assume that a stocks had an expected return of 10.00 percent and a standard deviation of 4.25 percent. What is the low end of returns would you expect to see 95 percent of the time? (Enter your answers as a percentage rounded to 2 decimal places. For example, enter 8.43% instead of 0.0843) Your Answer: Answer units In the last three years a stock had returns of 23.00%, -24.50%, and 7.50%. What was the arithmetic average annual return of the stock? (Enter your answer as a percentage rounded to 2 decimal places. For example, enter 1.53% instead of .0153.) Your Answer: Answer units The remaining balance on an amortized loan is paid down evenly over the life of the loan. For example, if you borrow $20,000 today on a 60-month amortized loan then your remaining balance reduces by 20,000/60=$333.33 each month