At December 31, 2022, the trial balance of Waterway Industries contained the following amounts before adjustment. Debit Credit Accounts Receivable $185,100 Allowance for Doubtful Accounts $ 1,480 Sales Revenue 855,300 (a) Prepare the adjusting entry at December 31, 2022, to record bad debt expense, assuming that the aging schedule indicates that $10,320 of accounts receivable will be uncollectible. (b) Repeat part (a), assuming that instead of a credit balance there is a $1,480 debit balance in Allowance for Doubtful Accounts. (c) During the next month, January 2023, a $2,130 account receivable is written off as uncollectible. Prepare the journal entry to record the write-off. (d) Repeat part (c), assuming that Waterway Industries uses the direct write-off method instead of the allowance method in accounting for uncollectible accounts receivable.