English future tenses

I'm sure you're doing/you'll do well in the play, don't worry.

Sorry, I can't come round this morning - I'm playing/I'll have played tennis until 12:00.

This is delicious! When are you teaching/going to teach me how to cook properly?

We'd better run - the shop is closing/closes at 5:30

I'll be finishing/I have finished this book by the end of the week. Can I borrow another one?

Just think - in three years' time, we're studying/we'll be studying at university!

I'll have sat/I'm going to sit down for a moment. I feel a bit sick.

By this time tomorrow, we're travelling/we'll have been travelling for six hours.

OK, I promise. I'm phoning/I'll phone you when I get home.

Am I going to meet/Shall I meet you at the station?