King Fisher Aviation is considering an investment in a new technology for a drone project with a price of $16 million. Their current technology has a book value of $5 million and a market value of $5 million. The new technology is expected to have a five (5) year life, and the old technology has three (3) years left in which it can be expected to be used. If the firm replaces the old technology with the new technology it expects to save $5.7 million in operating costs each year over the next four years. If the firm purchases the new technology, it will also need an investment of $300,000 in net working capital. The required return on the investment is 12 percent, and the tax rate is 39 percent.

What are the NPV and IRR of the decision to replace the old technology?

I don't understand how to get the NPV or IRR for this question for either technology. Is the $5.7 million considered a cash flow? If so, what is the cash flow for the old technology?