Presented here are five economic events. For each item, indicate whether the event increased (+), decreased (-), or had no effect (NE) on assets, liabilities, and stockholders' equity. Stockholders' Assets Liabilities + Equity 1. Received cash for services rendered. 2. Purchased supplies on account. I 3. Paid employees' salaries. 4. Dividends paid in cash. 5. Billed a customer for services rendered