If you find this quiz easy as pie, then you'll be an expert on idioms and similes!
English is surely not the only language to enjoy colourful expressions such as 'easy as pie' ~ though your own original language may well use some other image to express this idea.
Anyway, see how you get on with these!
'Up your street' (Answer 2) certainly suggests suitability for the audience, but the point at issue is whether Ron himself quietly has anything ready to do at almost a moment's notice. 'In his cups' suggests he will need to be drunk before he ventures to perform anything (probably not a good idea, unless you wanted the occasion to be memorable for wrong, and probably embarrassing, reasons).
Answer 4 is a 'dummy'; English has no such set phrase.