hello, i dont understand how to calculate problems please help

Annual cash inflows that will arise from two competing investment projects are given below: Year 1 2 3 4 Investment A $ 7,000 8,000 9,000 10,000 $ 34,000 Investment B $ 10,000 9,000 8,000 7,000 $ 34,000 The discount rate is 7%. Click here to view Exhibit 12B-1 and Exhibit 12B-2, to determine the appropriate discount factor(s) using tables. Required: Compute the present value of the cash inflows for each investment. Each investment opportunity will require the same initial investment Year Present Value of Cash Flows Investment A Investment B $ 0 1 2 3 S $