Traduire en français des phrases contenant un superlatif Traduction

Quelle est la traduction française de chacune des phrases suivantes ?

Marine is the smallest girl in the class.

This is the worst food I've ever tasted.

Being a mum is said to be the most difficult job in the world.

This is the least catastrophic thing you've done so far.

This is the most ravishing garden I've ever seen.