Which one is heaviest?

The pumpkins have been picked. We went to see them on display in the Resource Room. There is a competition to guess which one is the heaviest. 
Eleven children in Room 4 think our pumpkin will be the heaviest. Eight think Room 9s will be the heaviest and 2 think Room 13s will be heaviest. They will be weighed at Positive Assembly on 21st March, so we will find out then! Which one do you think will be the heaviest?

Picking our pumpkin.

Looking at all the pumpkins in the Resource Room.