1. "It's exactly half past twelve, time for lunch," Jen declared. "But look at the old electric clock. It's running backwards and showing 24 minutes past six." "I know," Scott told her. "It does that sometimes if the power has been cut off. And the lights did go off at 6 minutes past nine today." How long had the power been off that day?

Power off 28 minutes

Power off 42 minutes

Power off 51 minutes