solve on paper please

A firm is considering a project that will require investments at the end of each year for the next 4 years, but will then generate revenue cash flows of 5.4 at the end of each year into 4 perpetuity. The first investment will cost 9 million and each subsequent investment will increase by 2 million. The first revenue cash flow will occur at the end of year 5. Assuming that the cost of capital is 8%, calculate the NPV of this project, in millions of dollars