3. From 6 p.m. until midnight, the temperature dropped at a constant rate. From midnight until 1 a.m., it dropped 8°. If at 6 p.m., the temperature was 54° and by 1 a.m., it was 37°, what was the temperature at 10 pm.? (1) 46 (2) 48 (3) 45 (4) 49​