[5 Points] Your university is considering the construction of a new parking deck. The facility will have a 200-space capacity; the total construction cost is $4,000,000. The useful life is projected to be 30 years. The plan is to collect an average of $5 per day per space with an average capacity of 80%. Set up the equation necessary to solve for the Rate of Return for this proposal. The only variable in this equation should be the interest rate