2. Estimate graphically the rate of return for the following cash flow Cash Flow Year 0 2 4 -1,000 0 300 300 300 300 a) Write the equation of the net present worth with an unknown value of i. 2 Determine the net present worth of the cash flow at a low value and a high value of the interest rate b) 4 c) Draw the net present worth versus interest rate graph and from the graph estimate the rate of return 4 ote: Show all calculations