Test yourself on “dabei”

Which preposition do you need to translate the sentence:
“Thomas is at Maria’s place.”

How would you translate:

 “I’ll stay with you.”?

Which of the following sentences are suitable translations for this sentence:

“I like listening to music while working/at work.” ? 

(multiple answers)

The phrase “dabei sein” expresses multiple ideas. Which ones?
(multiple answers)

What is the meaning of:

“Bin grad’ dabei.” ?

Which is the most idiomatic translation for this sentence:
“Do you have cash with you?”

What idea does dabei express in the following statement:
“Ich esse. Dabei habe ich gar keinen Hunger.”