Given the discount rates and the future cash flows of each project, which projects should be accepted? (Only one of the four projects can he accepted under each of N'PV, Profitability Index and Payback Period Methods in each part of a, b and c) a) Calculate NPV for each of the four projects and decide which project should be accepted? b) Calculate Profitability Index for each of the four projects and decide which project should be accepted? c) Calculate Payback Period for each of the four projects and decide which project should be accepted