12. You anticipate a cash flow of $900 at the end of year 1, $600 at the end of year 2, and $800 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 years 1-4 such that the two cash series of flows are economically equivalent? The interest rate is 6% annual compounded annually.