Choose the right sentence:

1.
Harry will let you use the phone. Why don’t you ask Lisa?
Harry won’t let you use the phone. Why don’t you ask Lisa?

2.
I have no time. I will answer your questions later.
I have no time. I will not answer your questions later.

3.
It’s very hot here. I’ll open the window!
It’s very hot here. I’ill open the window!