ANSWER ASAP PLEASE. I NEED THE ANSWER IN 1 HOUR

You plan to install a new air-con at your office. The new AC costs 50kphp. It is estimated that the AC can save up to 11kphp annually of electricity costs. If the salvage value of the AC is 7.5kphp, at what value should the company's MARR be for the purchase be viable? Solve using Present Worth, Annual Worth, and Future Worth. Tabulate your answers and show cash flow diagrams. You plan to install a new air-con at your office. The new AC costs 50kphp. It is estimated that the AC can save up to 11kphp annually of electricity costs. If the salvage value of the AC is 7.5kphp, at what value should the company's MARR be for the purchase be viable? Solve using Present Worth, Annual Worth, and Future Worth. Tabulate your answers and show cash flow diagrams