It is desired to purchase a spiral heat exchanger for a capacity of 500 sq ft of exchange area maintenance of the new exchanger is expected to run $1.2k the life cycle of the unit is expected to be 7 years which time the salvage value is expected to be %15 of the purchase value. it is also expected that the efficiency the new unit will provide an average annual return of $3k. perform the following tasks: Estimate the cost of the exchanger according to today's value Draw a cash flow diagram of the system. If the value of return is set at 10% determine the overall operational cost of the unit using either past net worth or future net worth. An alternative to purchasing a new unit is continue operation of the current unit but at an annual operating and maintenance cost of $6k after annual return is factored in with no salvage value. compare your result from to the option and comment It is desired to purchase a spiral heat exchanger for a capacity of 500 sq ft of exchange area maintenance of the new exchanger is expected to run $1.2k the life cycle of the unit is expected to be 7 years which time the salvage value is expected to be %15 of the purchase value. it is also expected that the efficiency the new unit will provide an average annual return of $3k. perform the following tasks: Estimate the cost of the exchanger according to today's value Draw a cash flow diagram of the system. If the value of return is set at 10% determine the overall operational cost of the unit using either past net worth or future net worth. An alternative to purchasing a new unit is continue operation of the current unit but at an annual operating and maintenance cost of $6k after annual return is factored in with no salvage value. compare your result from to the option and comment