expected life. This expenditure involves pumping either water or CO2 down into the wells in order to increase the flow of oil and gas from the structure. The expected cash flows for the two projects are as follows: a. What is the payback period for each of the two projects? Based on the payback periods, which of the two project \begin{tabular}{|lr|} \hline Data table & x \\ \hline & \\ \hline \end{tabular} a. Given the cash flow information in the table, the payback period of the Barnett Shale project is years. (Round to two decimal places.)