In Book 7, what three Ministry of Magic employees do Ron, Harry, and Hermione impersonate?
Mafalda Hopkirk, Reginald Cattermole, and Albert Runcorn.
<s>[INST] <<SYS>> Answer as briefly as you can to the following question. You are required to give a one-shot answer: <</SYS>> In Book 7, what three Ministry of Magic employees do Ron, Harry, and Hermione impersonate? [/INST] Mafalda Hopkirk, Reginald Cattermole, and Albert Runcorn. </s>