. The table below shows a number of investment projects and their effective earned interest rates or returns. Given the market interest rates shown below, identify which projects will be undertaken and the total amount of investment spending that will ensue. Project Return on project Cost A 30% $1,000 B 28 500 C 22 2,500 D 17 1,000 E 8 750 F 4 1,200 a. 20% b. 15% c. 10% d. 5% e. 3% f. Sketch out the investment demand curve implied by these data.