Need Help with Number 2 and 3

Problem: A diagnostics laboratory is considering one of the following microscopes with digital recording and pattern detection software: Option A Option B Options C Cost $20,000 $30,000 $15,000 Savings $1,199 $2,199 $2,000 Interest 6% 9% 7% Each machine will have a 20-year life with no salvage value. There is a lot of debate within the company as to whether these devices are really going to last long, but they assume MARR of 10% as reasonable. 1. Calculate Present Worth for all Options showing your calculations 2. Calculate IRR for all options showing your calculations 3. Which Option do you recommend and why? Problem: A diagnostics laboratory is considering one of the following microscopes with digital recording and pattern detection software: Option A Option B Options C Cost $20,000 $30,000 $15,000 Savings $1,199 $2,199 $2,000 Interest 6% 9% 7% Each machine will have a 20-year life with no salvage value. There is a lot of debate within the company as to whether these devices are really going to last long, but they assume MARR of 10% as reasonable. 1. Calculate Present Worth for all Options showing your calculations 2. Calculate IRR for all options showing your calculations 3. Which Option do you recommend and why