Porika Company purchased a truck for $57,000 on January 1, 2016. The company expected the truck to last four years or 100,000 miles, with an estimated residual value of $6,000 at the end of that time. During the second year (2017) the truck was driven 27,000 miles. Compute the depreciation for the second year (2017) under each of the methods below, showing your labeled calculations in detail.

1. Straight-line 2. Units-of-Activity 3. Double-declining-balance