Please show all work step by step including formulas.. not using excel. must show work.

A thermoplastic film manufacturer is trying to decide between four types of thermoforming molding processes to be added to its molding operation. The estimated costs and revenue are shown below. Compare them on the basis of rate of return and determine which process should be selected if the company's MARR is 6% per year. Alternative Initial costs Annual expenses Annual revenue Salvage value Life, years IRR (%) Vacuum forming $31,000 $4550 $8550 $3100 8 Pressure forming $51,000 $4250 $12,250 $5100 8 Drape forming $43,000 $4450 $10,950 $1300 Free blowing $45,000 $5050 $12,050 $4500 8 6.68 8 2.66 6.87 6.03