Q4. The last four years of returns of a stock are as follows: Year Returns 1 -4% 2 +28% 3 +12% 4 +4% Calculate the average annual return and standard deviation of the stock's return. Q5. Suppose you made 10% gain in investing AAPL.US. Calculate the APR and EAR if the investment period is (a) 1 month; (b) S months; () 15 months; (d) 40 days; (e) 400 days. Q6. You borrow $10,000 from bank to purchase Apple Stock. The interest rate is 6% p.a., compounding semi-annually. How much do you repay to bank if you sell the stock (a) 3 months later; (b) 8 months later