please answer these financial accounting questions, thank you!!!

On 12/31/2020 the balance in Allowance for Doubtful Debts was $2,000. Based on determination by management, it was determined that 5% of Accounts Receivable was determined to be doubtful. The balance in the A/R as of 12/31/2020 was $1,000,000 Prepare the journal entry to record the year-end adjustment. On 2/15/2021 $500 from Customer A was determined to be uncollectible. Prepare the journal entry to record the write-off. On 5/15/2021 $200 was received from Customer A due to settlement. Prepare the necessary journal entry(entries)