Exxon Mobil Corporation, a multinational oil and gas company, invested $15 billion in capital expenditures and generated operating cash flows of $45 billion for the fiscal year 2020. Calculate Exxon Mobil's net present value (NPV) and internal rate of return (IRR) for a proposed oil exploration project with an initial investment of $10 billion and expected cash flows of $5 billion per year for the next five years.