Hi can someone help me answer this question? I need the solution in Excel.

Hi can someone help me answer this question? I need the solution in Excel.

You have purchased a lease for the Little Bear Oil well. This well has initial reserves of 100 thousand barrels of oil. In any year you have three choices of
how to operate the well: (a) you can not pump in which case there is no operating cost and no change in oil reserves; (b) you can pump normally in
which case the operating cost is $50 thousand and you will pump out 20% of what the reserves were at the beginning of the year; or (c) you can use enhanced
pumping using water pressure in which case the operating cost is $120 thousand and you will pump out 36% of what the reserves were at the beginning of the
year. The price of oil is $10 per barrel and the interest rate is 10%. Assume that both your operating costs and the oil revenue come at the beginning of the
year (through advance sales). Your lease is for a period of 5 years.

What is the maximum present value of your profit and what is the corresponding optimal pumping strategy?