Consider the following table with missing cash flows X1, X2, and X4 in project balance calculations. Period Cash flow Project balance -1000 -1000 0 X1 -1100 X2 -800 1 460 -500 X4 The interest rate used is: Consider the following table with missing cash flows X1, X2, and X4 in project balance calculations. Period Cash flow Project balance -1000 -1000 0 X1 -1100 X2 -800 1 460 -500 X4 The interest rate used is