i need part d

Rex Electrichas decided to move into low-rise ( 2 to 8 floors) commercial building electrical wiring. After great success in upscale residential and small commercial wiring. they have identified four independent and indivisible investments. any or all of which will help make the move to the next level. Rex Electric's MARR is 10%, and $500,000 is available for imvestment immediately, with $175,000 available for follow-up investment the next year. The cash flows are shown below. Click here to access the TVM Factor Table Calculator Parta Which alternatives should be selected by Rex Electric? Your answer is correct. What is the present worth for the selected investment portfolio? \$ Carry all interim calculations to 5 decimal places and then round your final answer to the nearest dollar. The tolerance is \pm 50 . Attempts: 1 of 3 used Part c What is the IRR for the optimum portfolio? % Carry all interim calculations to 5 decimal places and then round your final answer to 1 decimal place. The tolerance is \pm 0.2 . Attempts: 1 of 3 used Part d Using SOLVER for sensitivity analysis: Determine the optimum portfolio and its PW using (1) the current limit on investment capital, (2) plus 20\% to the year 0 limit, and (3) minus 20% to the year O limit. (1) PW: $ (2) PW: $ (3) PW: $