Q$\mathrm{.}5.$ An energy conservation project with a life of $5$ years has a total cost of Rs$.50,000$ has no salvage value. The cash flows are estimated to be $15,000$ per annum. Assuming a discount factor of $12\%,$ evaluale the NPV $($Net Present Vatue$),$ What is the profitability index $($pi$)$ for thin project? Explain the relevance of PI in the financial appraisal of projects.