Sophie had almost finished writing her final school report when her laptop suddenly froze. She tried restarting it, but the screen stayed black. Panicking, she called her friend Josh, who was good with computers. Josh arrived within 20 minutes. “Don’t worry,” he said. After checking a few things, he realized the charger wasn’t working. Luckily, Josh had a spare charger at home. He went to get it, and when he plugged it in, the laptop turned on. “You’ve saved my life,” Sophie said, laughing. Thanks to Josh, she submitted her report just in time.