1. A four-year investment project requires an initial investment of $65,000 at inception and maintenance expenses at the beginning of each year. The maintenance expense for the first year is $10,000, and is anticipated to increase by $1,000 per year thereafter. Projected annual returns from the project are $40,000 at the end of the first year decreasing 10% per year thereafter. Find the internal rate of return during the four-year period