Find the value of the unknown quantity X in the following diagram, such that the equivalent cash outflow equals the equivalent cash inflows when, 1. Interest rate = 15% per year. 2. Interest rate = 15% per year compounded quarterly, 3. Interest rate = 15% per year compounded continuously A1 = $1200 A2 = $600 1 2 3 4 $ 6 7 8 9 10 $1200