Consider the following two pumps at an interest rate of 6%. determine which one should be installed based on annual worth analysis?

Vender 1 Vender 2 Vender 3 First cost, S -200,000 -550,000 -1,000,000 Annual O&M costs S/year -50,000 -20,000 -10,000 Revenue, S/year 120,000 120,000 110,000 Salvage value, S 25,000 500,000 Life 10 15