You have been asked by the president of your company to evaluate the proposed acquisition of a new special-purpose machine. the machine's total price including installation and delivery is $70,000. the machine falls into the four-year class using straight line depreciation method, and it will be sold after four years for $0. the use of this new machine will bring revenue of $25,000 annually for 4 years, and will have annual maintenance expense of $5,000. the firm's marginal tax rate is 40 percent and the required rate of return is 10%. ( show your work)

a. what is the initial investment ? (keep your number as a whole number: example of answer format: $1,000)
b. what is the cash flow at year 1 ? ( keep your number as a whole number: example of answer format: $1,000 )
c. what is the cash flow at year 4 ? ( keep your number as a whole number: example of answer format: $1,000 )
d. what is npv ? ( keep your number to two decimals: example of answer format: $1,000.00 or if it's negative, then -$1,000.00)