need help with accounting homework please see attached

HW Assignment 3 - Depreciation You MUST show all work in order to receive credit for the problems. Problem 1 James Delivery Inc. purchased a truck on April 1, 2014 for $45,000. The truck is expected to have a useful life of 5 years and a salvage value of $3,000. They expect to drive the truck for 80,000 miles. Required: Calculate depreciation expense for all 5 years under each of the following methods: 1. 2. 3. 4. Straight-line Double-declining balance Sum-of-the-years' digits Units of Activity assuming that the truck had the following actual miles: 2014 - 15,000 miles 2015 - 18,000 miles 2016 - 20,000 miles 2017 - 22,000 miles 2018 - 9,000 miles Problem 2 Expo Inc. purchased a machine on January 1, 2013 for $300,000. They estimated the useful life to be 6 years. They estimated a salvage value of $20,000 and have been using the sum-of-the year's digits method of depreciation. In 2015 they changed depreciation methods from sum-of-the year's digits to straightline. Required: 1. What is the journal entry to correct the depreciation expense in 2013 and 2014? 2. Prepare the journal entry to record the depreciation in 2015. Problem 3 Machinery purchased for $52,000 by Carver Co. on January 1, 2010 was originally estimated to have a life of 8 years with a salvage value of $4,000 at the end of that time. Depreciation has been entered for 5 years on this basis. In 2015, it is determined that the total estimated life should be 10 years with a salvage value of $4,500 at the end of that time. Assume straight-line depreciation. Required: 1. Prepare the entry to correct the prior years' depreciation, if necessary. 2. Prepare the entry to record depreciation for 2015