Would love some help on understanding the best way to approach this... Thanks!!!

The cash flows for three different alternatives are given in table below. MARR =10%.

Alt. A Alt. B Alt. C

Initial cost $5,000 9,000 7,500

Annual benefits $1,457 2,518 2,133

RoR 14% 13% 12.4%

Life in years 5

1. RoR for the first increment (Alt. C-Alt. A) is ___________________.

A. 10.12% B. 9.38% C. 11.85% D. 11.00%

2. RoR for the second increment is ___________________.

A. 10.12% B. 9.38% C. 8.94% D. 9.87%

3. The best alternative for a MARR of 10% using the incremental rate of return analysis is ____________.

A. Alt. C B. Alt. A C. Alt. B D. Do-nothing