When Esme woke up, the temperature was 5.3 degrees below zero. by noon, the temperature had increased by 12.8 degrees. plz help complete the statements to explain how to determine the temperature at noon

the temperature when esme woke up is best represented by a . negative/ positive?
the temperature at noon can be determined using the expression . 5.3 + 12.8 or -5.3 +12.8 or -5.3 - 12.8 or 5.3 - 12.8?
the temperature at noon was ___ 18.1 or 7.5 degrees below or above zero.