b) Assume an investor purchase one share of stock for 50 at time t = 0, another share for 60 at t = 1, and two more shares for 80 at t = 2. At the end of Year 3, the investor sold all four shares for 100 each. Stocks paid a 3 dividend each at the end of Year 1 and Year 2 while paid a 5 dividend each at the end of Year 3. What is the time- weighted rate of return on the investment? (6 marks, reserve two decimal places)