At 31 December 2020, an extract of trial balance of Young Shall Grow Ltd contained the following amounts before adjustment: Dr CR Accounts Receivable 500,000 Allowance for Doubtful Debts 4,500 Sales 750,000 Sales returns and allowance 40,000 Required: a. Prepare the adjusting entry as at 31 December 2020 to record the bad debts expense assuming that the ageing schedule indicates that 2% of accounts receivable will be uncollectible. b. During January 2021, a $3,000 customer balance is written off as uncollectable. Prepare the journal entry to record the write-off. c. During February 2021, the customer whose account was written off on January 2021 unexpected paid $1,500. Prepare the journal entry to record this transaction. Narrations are not required