Book refrence: Engineering economy 7ht edition

Please answer the question carefullly as soon as possible given below.

Question:

2. The cantonment board is considering various proposals regarding the disposal wastes. All proposals involve chopping of wastes, but the benefits differ in each plan. An incremental B/C analysis was started, but the economist conducting the study left recently. Based on 22-year study period and an interest rate of 9% per year, complete the incremental B/C columns of the table and deduce that which alternative should be selected? Alternatives Present Benefit/Cost A B C D worth of ratio cost (million) A 10 1.1 2.83 B 40 2.4 2.83 C 60 1.7 D 90 2.1