Sneetch Inc. purchased a star-making machine on 1/1/2011. The cost of the machine was $17,000. Its estimated residual value was $2,900 at the end of an estimated 10-year life. (a) Calculate depreciation expense for 2011 and 2012 using the straight-line method. (Omit the "$" sign in your response.) 2011 2012 Depreciation expense $ 1410 $ 1410 (b) Calculate depreciation expense for 2011 and 2012 using the double-declining balance method. (Omit the "$" sign in your response.) 2011 2012 Depreciation expense $ 3400 $ 2720 (c) Calculate the net book value of the machine as of 12/31/2012 under straight-line depreciation. (Omit the "$" sign in your response.) Net book value $ (d) Calculate the net book value of the machine as of 12/31/2012 under double-declining-balance depreciation. (Omit the "$" sign in your response.) Net book value $