Please show me the way you calculate these, thanks

You are planning to open a restaurant in Brickell. Following the initial investment of $1,092,841, the expected cash flows over the next 4 years are as follows. What is the payback period of this project? t Cash Flows 1 $394,392 2 $282,192 3 $158,587 4 $426,813 You are planning to open a restaurant in Brickell. Following the initial investment of $1,047,671, the expected cash flows over the next 4 years are as follows. What is the discounted payback period of this project? Assume the discount rate is 4% t Cash Flows 1 $456,091 2 $273,767 3 $315,876 4 $339,884 You are evaluating a project that requires an initial investment of $808,833. During the first two years, such project will provide positive free cash flows of 524,286, 529,038. The discount rate for this project is 4. What is the net present value