The annual equivalent costs for challenger and defender are given as follow: n AEC-Defender AEC-Challenger 1 $2,500 $6,000 2. $2,300 $4,000 3 $2,600 $4,100 4 $1,900 $5,000 5 $2,200 $5,200 Using the finite planning horizon of 6 years, apply the present worth analysis to determine Go, 1), (1, 2), (,3) Assume i=15%