i had this probability question on my test and i had absolutely no idea how to do it. please help me.

suppose you have a standard 52 card deck of playing cards and 1 joker. you spread these cards face down over a table. now one by one, you flip over cards and you can only flip over each card once. What is the probability that you will flip over all 4 aces before you flip over the 1 joker?