The company is proposing to build a $10-million power plant to burn its waste as fuel, thereby saving $2.8 million a year in coal purchases. Company engineers have determined that the waste burning plant will be environmentally sound, and after its four-year study period the plant can be sold to a local electric utility for $5 million. [15 points] (a) What is the IRR of this proposed power plant? (with steps) (b) If the firms MARR is 15% per year, should this project be undertaken?