Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to save energy automatically with your computers [title] Use energy-efficient computer models. [step] Some computers have been manufactured and tested specifically to ensure that they consume less energy. [substeps] Verify that your computers have an energy star logo or other government-supported logo, which indicates that the computers save costs on energy bills and are designed to help reduce pollutants that are harmful to the environment.

Ending1: [title] Download and install a new operating system. [step] If you're simply content programming for fun, but very intelligent, you'll need a system that is compatible with faster computer systems. Ending2: If the logo does not include this logo or identifying features, then your computer model may be defective or unusable. [title] Look for a lower spf versus b12 rating. Ending3: [title] Use laptop computers instead of desktop computers. [step] The majority of laptops only burn between 15 and 60 watts when in use; whereas desktop computers burn between 70 and 200 watts when in use. Ending4: Verify that your batteries are compatible with computers with live, static electricity. Check if your computer has live cable and connections, which contribute to energy costs.

Answer format: ending1/ending2/ending3/ending4