German Greetings, Introductions, Numbers, and 'sein'

What is a greeting that a German would use in the morning?

What is a typical Austrian greeting?

How would you ask someone their name in German?

How would you tell someone, 'See you later!'?

How would you write this sequence of numbers in German?: 13, 8, 20, 15

How would you write the following sequence of numbers in German?: 12, 9, 17, 11

Choose the correct form of the verb 'sein' to complete this sentence: Ich ______ vierzehn.

Fill in the blank with the correct form of the verb 'sein' to complete this sentence: Peter _______ achtzehn.

Choose the correct form of the verb 'sein' to complete this question: Wie alt _______ du?

What German 'good-bye' means 'until we see each other again'?