For all problems, sketch the timeline cash flow to represent each option. Please show the detailed calculations used to And different parameters and describe the reason for selecting certain option/alternative, if any. A contractor has three options for purchasing a new crane. He can pay $600,000 in cash (option 1) or he can pay $150,000 in cash and annual payments of $100,000 for five years (option 2) or he can pay nothing up front and make $60,000 annual payments for 15 years (option 3). Assume an effective interest rate 6f.f. and ignore maintenance costs and salvage. Which is the best option for the contractor using net present value analysis? The maintenance cost for a public project is $2000 per year for the first 10 years and $1000 per year thereafter. The investment has infinite life. With a 10interest rate, determine the present capitalized cost of this project. Assume no initial cost. The activated sludge unit of a wastewater treatment plant requires an aerator. Two options exist and have the characteristics shown in the table below. The city that owns the treatment plant has established an interest rate of 6% for all city investment decisions. Determine which aerator to purchase (use effective uniform annual cost method EUAC)