someone answer me fasst

Problem 1: Four design alternatives were proposed. Each design alternative has unique costs and benefits. Given the information for the four mutually exclusive in the table below, recommend the best alternative using the incremental B/C ratio analysis method knowing that the MARR is 6%. (Use the PW in your calculation) and Alternative 2 3 4 Capital investment 12500 11000 12500 16800 cost s Annual operating 120 480 450 140 maintenance costs Annual utility 580 700 950 1300 savings Annual revenue $ 700 550 200 250 Annual other 400 750 150 500 benefits Project life in years 40 40 40 40