Please answer letter B while showing your work please:

Mistral Manufacturing is considering an investment in a new, high-efficient machine. The new machine requires an initial investment of $1,750,000. The new system cash flows of either: 8. a. Even cash flows of S350,000 per year or b. The following expected annual cash flows: $275,000, $420,000, $820,000, S470,000, and $150,000 Required: Calculate the payback period for each case