6) You anticipate a cash flow of S900 at the end of year 1, S600 at the end of year 2, and $500 at the end of year 4. What is the annual equivalent of the cash flow for years 1 through 4? In other words, what constant value "A" could you receive at the end of each of the years 1-4 such that the two cash senes of flows are economically equivalent? The interest rate is 6% annual compounded annually