3) The firm pays $5,000 of the amount owed from event #2 above. a) debit Accounts Payable 5,000, credit Superbike 5,000 b) debit Accounts Payable 5,000, credit Accounts Receivable 5,000 c) debit Cash 5,000, credit Accounts Receivable 5,000 d) debit Accounts Payable 5,000, credit Cash 5,000 4) The firm does atomic research for Dr. Xavier of the X-Men, invoicing that customer $2,000. a) debit Revenue 2,000, credit Accounts Payable 2,000 b) debit Cash 2,000, credit Revenue 2,000 c) debit Accounts Receivable 2,000, credit Revenue 2,000 d) debit Accounts Payable 2,000, credit Revenue 2,000