3. MARR Ltd. is considering the launch of "Flying Hotel". The project initially costs $4,500,000 for capital spending, has a five-year life, and has no salvage value; depreciation is straight-line to zero. Sales are projected at 350 units per year; price per unit will be $25,000, variable cost per unit will be $13,500, and fixed costs will be $650,000 per year. The required return on the project is 15% and the tax rate is 22%. a. MARR Ltd. is confident about the sales price, unit sales, and variable cost per unit are accurate to within + 15 percent. What are the base-case, worst-case, and best-case scenarios NPV? (15 Points) b. What is the sensitivity of NPV to changes in variable cost per unit? (5 Points)