At 7:00 a.m., the temperature was -8 degrees. Between 7:00 a.m. and 8:00 a.m., the temperature dropped by 2 degrees. Between 8:00 a.m. and 9:00 the temperature increased by 4 degrees. Between 9:00 a.m. and 10:00 a.m. the temperature increased by 12 degrees. What was the temperature at 10:00 a.m.