(6) Indicate whether each of the following accounts appears in the dcbit column or in the credit column of an after closing trial balance. Use the symbol D for debit coluinn, C for credit columa, and N if the account does not appear in an after closing trial balance. (3 marks) 1. Building 2. Investigation revenue eamed 3. Retained Eamings 4. Income summary of a profitable company) 5. Saluries Payable 6. Income tax expense