Five years ago, a company made a $5 million investment in a new high-temperature material. the product was not well accepted after the first year on the market. however, when it was reintroduced 4 years later, it did sell well during the year. major research funding to broaden the applications has cost $15 million in year 5. using a net present worth balancing equation and a manual iteration process, find the rate of return for the cash flows listed below.