7. (4 points) On December 31, 2017, Ivanhoe Company acquired a computer from Plato Corporation by issuing a $400,000 zero-interest-bearing note, payable in full on December 31, 2021. Ivanhoe Company's credit rating permits it to borrow funds from its several lines of credit at 7\%. The computer is expected to have a 5 -year life and a $20,000 salvage value. a. Prepare the joumal entry for the purchase on December 31, 2017. b. Prepare any necessary adjusting entries relative to depreciation (use straight-line) and amortization (use effectlve-interest method) on December 31, 2018