Superlatif de supériorité

Fill in the blanks
Mettre les adjectifs ou adverbes entre parenthèses à la forme du superlatif de supériorité:
1. Her attitude is (serious) of all.
2. He woke up (early) possible.
3. He seems to be (sad) .
4. This activity is (funny) I have ever seen.
5. These statistics are (low) of all times.