i tried to do ARR formula byt my answers were wrong. i need guidance on what to do.

(c) Your answer is incorrect. Compute the annual rate of return for each project. (Hint: Use average annual net income in your computation.) (Round answers to 2 decimal places, e.g. 10.50\%.) U3 Company is considering three long-term capital investment proposals. Each investment has a useful life of 5 years. Relevant data on each project are as follows. Depreciation is computed by the straight-line method with no salvage value. The company's cost of capital is 15%. (Assume that cash flows occur evenly throughout the year.)