A continuous improvement has helped a company to raise savings with associated probabilities shown in the table below. The useful life is 5 years with a probability of 0.6 and 3 years with probability of 0.4. 1:Determine the joint probability distribution for savings per year and useful life.

2:Determine the expected NPW if an investment of $50,000 is required. No salvage is expected. Use a MARR of 10%

\begin{tabular}{|l|l|} \hline Annual Benefit & Probability \\ \hline$15,000 & 0.25 \\ \hline$20,000 & 0.45 \\ \hline$25,000 & 0.3 \\ \hline \end{tabular}