I like the second part, but they say in the book that Wormtail needed a lot of help from Padfoot and Prongs. So I guess he could have been second, but I feel like James and Sirius would have been first, and then completely focused on Peter.
Actually, the wording wouldn't be "why can not you get me some ice cream". It would be "why can you not get me some ice cream". Just because a contraction is used does not mean that the word and not are next to each other.