I need help on 3 and 4.

3.Hickory Corporation recorded sales revenue during the year of $350,000 of which S100,000 was on credit. The company has experienced an average bad debt loss rate of 2% of credit sales. Required: Prepare the adjusting journal entry at the end of the year to record bad debt expense. 4. At year-end, Chief Company has a balance of $10.000 in accounts receivable of which $1,000 is more than 30 days overdue. Chief has a credit balance of $100 in the allowance for doubtful accounts before any year-end adjustments. Using the aging of accounts receivable method, Chief estimates that 1% of current accounts and 10% of accounts over thirty days are uncollectible. What is the amount of bad debt expense