German Greetings, Introductions, Numbers, and 'sein'

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

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'?