Coronado, Inc. is considering purchasing equipment costing $39000 with a 7-year useful life. The equipment will provide cost savings of $8700 and will be depreciated straight-line over its useful life with no salvage value. Coronado Inc. requires a 9% rate of return. What is the approximate internal rate of return for this investment? Period 7 O 8% O 9% O 10% O 11% 7% 5.389 8% Present Value of an Annuity of 1 5.206 9% 5.033 10% 4.868 11% 4.712 14% 4.288