This assignment requires the calculation of payback period and net present value (NPV) for two different projects, Project X and Project Y. The payback period is determined by adding up the cumulative cash flows until it becomes positive. For Project X, the payback period is 4 years, whereas for Project Y, it takes 8 years. The NPV calculation involves discounting the future cash flows using a given interest rate of 12%. The results show that Project Y has a higher NPV than Project X, indicating that it is more profitable.