>Five questions need to be answerd need the process. limited in one hour.1.1.The Army Corps of Engineers is working in an area subject high water conditions and occasional flooding. Several choices are available to protect their construction equipment. Using the information provided construct a decision tree diagram and recommend the best alternative. 2.2. As the City Engineer for a flood-prone rural community you are considering two alternatives to minimize flood damage for its residents. Data for your analysis follows. Using the total cost concept determine the best alternative based on a 50-year life and a discount rate of 6% p.a. 3.3.Solar and conventional alternatives are available for providing energy at a remote space research site and one must be chosen. The costs associated with each alternative are shown below. Using incremental B/C analysis select the best alternative at a discount rate of 0.75% per month over a 6-year study period. 4.4.ABC Company is evaluating two new technologies for its elevators. The costs associated with each alternative are shown below.The MARR is 9% per year over a 8-year study period. Assume that one will be chosen. Draw the appropriate cash flow diagrams for part a and b and the incremental cash flow diagram for part c and d and determine the best alternative based on a) PW analysis b) AW analysis and c) Incremental ROR analysis (no need to find the exact ROR. Just plug in MARR and provide your conclusion.) I will send the graphs later.