Please provide step by step explanation

1. Hamilton Inc is considering a project that results in the following after-tax cash flows: t = 0: -234, t = 1: 250, t = 2: 150, and t = 3: 112. What would be the NPV of this project for Hamiton Inc, if they discount future cash flows at a 6.1% rate? Note that the initial cash flow is negative!

2.Oneonta uses the Payback Method for Capital Budgeting: Suppose it has a t = 0 cash flow of -$1,050, followed by cash flows of $400 at t = 1, $500 at t = 2, $180 at t = 3 and 150 at t = 4. What is the Payback for Oneonta? Input in units of years to a two-place precision.