Case study 3: As a manufacturing engineer, you have prepares a cost justification project to purchase a new machine for $28,000 at year 0. The useful life of the machine is 6 years, at the end of which the machine is estimated to have salvage value of $5,000. The machine generates net annual revenues minus expense is $9,000. Assuming the MARR of the company is 20%, answer the following questions: a. Draw a cash flow to represent the project b. Use present worth (PW) method to identify whether it is a justifiable project c. Use rate-of-return method to identify the rate of return of this project to decide whether it is a justifiable project.