Equipment is bought for an initial cost of $20,000. Its operation will result in a net income of $6,000/Yr for the first year, increasing by $1,000 each year after year 1. At the end of the fifth year, the equipment is sold for $5,000. The prevailing interest rate for the next five years is estimated at 10%. a. Draw the cash flow diagram for this project. b. Calculate the NPW.