please do it in 40 minutes please urgently... I'll give you up thumb definitely

1. (10 Marks) Determine the economic life for each of the items listed in the box. Salvage values can be estimated by the declining-balance method using an annual rate of 20 percent. The MARR is 8 percent. Purchase $10 000 Installation $2000 Item 1 Item 2 $20 000 $2000 Operating $300 first year, increasing by $300 per year $200 first year, increasing by $200 per year $2000 first year, increasing by $2000 per year Item 3 $30 000 $3000