A company has three project alternatives as follows.

Project A B C

First Cost $39,000 $20,000 $31,000

Salvage Value $2,000 $4,000 $6,000

Annual Maintenance $1,200 $1,600 $800

Annual Income $18,800 $14,400 $16,200

Useful Life (years) 6 3 5

a. Utilize the present worth analysis to help the company to select the best project assuming that these projects are mutually exclusive and the interest rate is 10%?

b. Utilize the annual worth analysis to evaluate these mutually exclusive projects with an interest rate of 12%.

c. If these projects are independent, utilize the RoR (IRR) analysis to check which project(s) is worthy assuming that the MARR of the company is 15%.

d. If these projects are independent, utilize the EROR analysis to check which of these project is worthy. Assuming that the interest rate of investment is 13% and the interest rate of borrowing is 8%.