Help the cooking instructor finish his slightly panicked instructions by choosing the correct question tag for each gap.

"Alright team, let's try not to burn the kitchen down today, shall we?

Wait, nobody added salt to the chocolate cake frosting, did they?

Quick, just hand me that fire extinguisher, will you!"

"Alright team, let's try not to burn the kitchen down today, shall we?

Sentences starting with "Let's" (Let us) take the tag shall we.

Wait, nobody added salt to the chocolate cake frosting, did they?

"Nobody" is a negative word, so the tag must be positive. Even though "nobody" is singular, we use the pronoun they (and the plural auxiliary "did") in the tag.

Quick, just hand me that fire extinguisher, will you!"

For imperative sentences (commands or requests), we typically use will you (or sometimes "would you" / "could you") as the tag.