please help

Equipment was purchased on 1/1/2012 in the amount of $725,000 with salvage value of $75,000 and useful life of 5 years. What is the book value of the equipment on 12/31/2014 using Straight Line Depreciation? An item was purchased for $275,000 with a useful life of 10 years and a salvage value of $25,000. Using the Double Declining Balance method of depreciation what is the depreciation expense for years one and two respectively