On December 31, 20x0, the HGT Corporation completed the construction of a cement production facility. The total cost of the facility was $5,600,000 and had a 25 year useful life. At the end of the facility's useful life, the site has to be decommissioned at an expected cost of $2,000,000. The relevant discount rate is 4%. HGT uses the straight-line method to depreciate its property plant and equipment. Required (a) What will be the interest expense accrued on the asset retirement obligation and the depreciation expense in 20x1 and 20x2. (b) In 20x22, due to advances in technology, management estimates that the cost to decommission the site will only be $500,000. Write the journal entry at the beginning of 20x22 to reflect this change. Assume that the discount rate has changed to 6%