i have 3 questions which are tricky for me, please find attached and help with answers

4. which of the following transactions violates the balance sheet quotation? (check all that apply) Reduce cash & reduce an expense Increase an expense & reduce a liability Increase cash and reduce contributed capital Increase a Liability and increase a revenue Increase retaining earnings and increase a liability 5. which of the following are liability?(check all that apply) Common stock Employment contracts Retained earnings Salaries payable Prepaid rent 6. which of the following accounts would be increased with a credit? (check all that apply) Revenue Inventory Noted payable Additional paid-in capital Prepaid rent