Martha's Cupboards Just Purchased $172,500 of New Equipment

Martha's Cupboards just purchased $172,500 of new equipment. The equipment is expected to increase the net income of the firm by $15,000, $35,000, $25,000, and $10,000 a year in each of
The next four years. Martha's uses straight-line depreciation over the projected life of each project.
What is the average accounting rate of return on this equipment?

A) 5.90%
B) 12.32%
C) 18.37%
D) 24.64%
E) 49.28%