Minnesota's energy department is trying to decide how to expand the State's energy pro- duction. One option is to set up wind mills with an expected lifetime of 10 years.Another is tomake a solar energy farm with an expected lifetime of 12 years.The wind mills initiative wouldcost $80,000,000 to construct and yield net benefits of $20,000,000 at the end of each year, for 10 years.The solar energy farm initiative wouldcost $30,000,000 to construct and yield net benefits of $5,000,000 at the end of each year, for 12 years.Each project is assumed to have zero salvage value at the end of its life.Using a real discount rate of 2 percent, which project offers larger net benefits?Approach the problem using the Roll-Over and the Equivalent Annual Net Benefit methods.

You don't have to answer the whole question, i just want to know how to do the roll-over method