Give us the entire question. If it's not in English, give it to us as it is originally written and then translate it as best you can (we may have someone who speaks that language who can confirm your translation of technical aspects).
If there are any diagrams, give them to us as well.
Are we meant to assume a push-pull output stage? That's what I'm thinking, but if I give you hints for that and it isn't, I'll only confuse you more.