Presented below is information taken from a bond investment amortization schedule with related fair values provided. These bonds are classified as available-for-sale. 12/31/21 12/31/22 Amortized cost 12/31/20 $512,100 $517,600 $545,200 $533,900 $596,100 $596,100 Fair value (a) Indicate whether the bonds were purchased at a discount or at a premium. (b) Prepare the adjusting entry to record the bonds at fair value at December 31, 2020. The Fair Value Adjustment account has a debit balance of $1,000 prior to adjustment. Prepare the adjusting entry to record the bonds at fair value at December 31, 2021. (c)