please help me that question. Thank you!

1. Prepare depreciation schedules for the following methods: (a) straightline, (b) units-of-activity, and (c) declining-balance using double the straight-line rate. 2. At December 31, 2017, Skyline Limousine Co. is trying to determine if it should sell the limo. Under each of the three depreciation methods, how much should Skyline sell the limo to have a minimum gain of $6,000