Future Tense: Will vs Going to

Which of the following sentences uses 'will' to make a promise?

Select all situations where 'going to' is the correct choice:

I think Alvarito will win the next election.

Luis is going to travel to Colombia the next month.

Your friend is carrying heavy boxes. You say: A. Don't worry, I'll help you. B. I'm going to help you. Which is correct and why?

A : why did you buy this flour?

B : I _________ make some bread.

I arranged to borrow some money because I _______ buy a motorcycle tomorrow.

Mom: Could somebody answer the phone?

Alex: I ______ get it.

Ami : Hey! Look at those dark clouds!

Kiki : Wow! It ..............rain soon.