1. What happens if engine life varies by type - CNG & Gas engines average 60,000 miles and cost @ $3,500 while Diesel engines average 80,000 miles and cost $5,000 2. a. What if Gas and Diesel prices increase by 60% in year 5 of this scenario (same scenario first 4 years)? b. What happens if fuel prices for CNG are as discussed but Gas and Diesel prices increase by 15% per year starting in 2020. c. What happens if Gas/Diesel permanently shift to $7.00/gallon in 2022 (same scenario first 4 years)? 3. What tax incentive(s) would cause CNG vehicles to have the least cost? Same for Electric. 4. How would straight-line depreciation or 100% first year depreciation affect your total cost estimates? 6. What happens if you need to replace the batteries in the electric vehicles after every 30,000 and the replacement cost is $4,000? 7. How do these sensitivity analyses impact your conclusion?