Bad Clock -_-

Level pending

Timothy has a clock that gains 15 minutes each hour; for instance, if it shows the correct time at 3:00 p.m., one hour later it will show a time of 4:15 p.m. when it should show 4:00 p.m. Last night, Timothy set his clock to 10:00 p.m. (which was the correct time). While he was sleeping, the clock stopped working and showed a time of 4:00 a.m., which was 4 hours before Timothy woke up. What time did Timothy wake up? (if your answer is hh:mm, express it as hh.mm)

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