Zetamax is considering buying a new bar-coding machine for its Austin, Texas, plant. The data for the machine follow: Cost of machine.. Estimated residual value Estimated annual net cash inflow. Estimated useful life. Required rate of return $48,000 $ 0 $13,000 5 years 16% Required 1. Compute the bar-coding machine's payback period. 2. Compute the bar-coding machine's accounting rate of return. 3. Compute the bar-coding machine's net present value. 4. Would you buy the bar-coding machine? Why