Please help me with this question, I am really confused and it has not been answered properly before. Thank you

A10-16 Fractional Depreciation (LO 10-2) The following information relates to Riggs Corp.'s purchase of equipment on 15 June 20X7: Invoice price Discount for early payment (if paid by 30 June) Shipping costs Installation Testing $454,000 2,310 5,200 5,000 10,000 The equipment was installed and tested during the week of 22 June 20x7. Riggs paid the invoice price on 1 July 20X7. The equipment was ready for use on 30 June and put into production on 3 July 20x7. Riggs uses straight-line depreciation for the company's equipment and expects to use the asset for six years. Component parts are not significant and need not be recognized and depreciated separately. The estimated residual value is zero. The company's fiscal year-end is 31 December. Required: 1. What is the book value of the equipment after installation? Book value of the equipment after installation 2. Compute depreciation expense for 20X7, using the straight-line method, under each of the following assumptions: (Round your answers to nearest whole dollars.) a. Exact, to the closest month b. Full first-year convention c. Half-year convention 20X7 a. Closest month b. Full first year c. Half-year convention 3. Not available in Connect. 4. Calculate depreciation expense for both 20X7 and 20X8 under each of the methods in requirement 2, using declining balance depreciation with a 33% rate. (Round your answers to nearest whole dollars.) 20X7 20X8 Closest month Full first year Half-year convention