Question 2 Return calculations (10 marks) Amira Brar's tax rate is 40% and the inflation rate is 2% p.a. Assume these rates applied for the last five years. Her taxable investment account earned the following annual rates of return: +14%, +2%, +8%, -6%, +10%. a) Calculate the arithmetic and geometric mean rate of return on her investments. b) Using the geometric mean return, calculate; nominal real rate of return; nominal after-tax rate of return; real after-tax rate of return. c) When would she use each of these different rates of return