The status of cash flow for four projects is given in the following table. $($Negative

figures at the end of year $0$ represent initial investment$).$

Calculate Net Profit $($NP$),$ Payback Period $($PP$),$ Return on Investment $($ROI$)$ and Net

Present Value $($NPV$)$ on the basis of above table. You may assume discount rate to be

as $10\%.$