Составить предложение либо с отрицанием,либо с утверждением....,doesn't she? ..did we? ..,won't he? ...,aren't we? ...,can't

My mother cooks her favourite cake brilliantly, doesn\'t she?

Sam and I didn\'t want to go to a prehistoric exhibition, did we?

My grandfather will be 100 next week, won\'t he?

Daisy and I are the best students in our university, aren\'t we?

David Copperfield can stay underwater for half an hour, can\'t he?