Summer Company is considering three capital expenditure projects. Relevant data for the projects are as follows:

Project	Investment	Annual Income	Life of Project
22A	$192,000	$13,400	6 years
23A	216,000	16,500	9 years
24A	224,000	14,000	7 years

Annual income is constant over the life of the project. Each project is expected to have zero salvage value at the end of the project. Summer Company uses the straight-line method of depreciation.

a) Determine the internal rate of return for each project