I need help on this part. I have no idea what to so. Can anyone help me??

Chipman Sofware recently reported the following amounts in its unadjusted trial balance at its year-end: Debits S3,ooo Accounts Receivable Allowance for Doubtful Accounts Sales (assume all on credit) Required: Page Credits s 20 44,000 1. Chipman uses 1/4 of 1 percent of sales to estimate its Bad Debt Expense for the year Prepare the adjusting journal entry required for the year, assuming no Bad Debt Expense has been recorded yet. 2. Assume instead that Chipman uses the aging of accounts receivable method and estimates that SGO of its Accounts Receivable will be uncollectible. Prepare the year-end adjusting journal entry for recording Bad Debt Expense. 3. Repeat requirement 2, except this time assume Chipman's year-end unadjusted balance in Allowance for Doubtful Accounts was a debit balance of S20_ 4. If one of Chipman's main customers declared bankruptcy after year-end, what journal entry would be used to write off its S 15 balance?