moore water softeners is considering a new project to upgrade their water softening system. the initial investment for the project is $575,000. they estimate that they will gain an additional $94,000 in revenues and spend an extra $17,000 on expenses. they expect to use this new system for 15 years. what is the internal rate of return factor for this project? 6.11702 4.97835 5.02165 7.46753