help solve this please

An oil-drilling company must choose between two mutually exclusive extraction projects, and each requires an initial outlay at t=0 of $13 million. Under Plan A, all the oil would be extracted in 1 year, producing a cash flow at t=1 of $15.6 million. Under Plan B, cash flows would be $2.31 million per year for 20 years. The firm's WACC is 12%. a. Construct NPV profiles for Plans A and B. Enter your answers in millions. For example, an answer of $10,550,000 should be entered as 10.55 . If an amount is zero, enter 0. Negative values, if any, should be indicated by a minus sign. Do not round intermediate calculations, Round your answers to two decimal places. Identify each project's IRR, Oo not round intermediate calculations. Round your answers to two decimal places. Find the crossover rate. Do not round intermediate calculations. Round your answer to two decmal places. b. Is it fogical to assume that the firm would take on all available independent, average-fisk projects with returns greater than 126 ? If all avalable projects with returns greater than 12% have been undertaken, does this mean that cash flows from past investments have an opportunity cost of only 12%, because all the company can do with these cash flows is to replace money that has a cost of 1246