Ellie has entered a skating competition which is judged by five people.  To win, Ellie needs an average (mean) score of at least $$8.5$$.  The first four judges award Ellie  $$7.9$$~ ~ ~$$8.3$$~ ~ ~$$8.8$$~ ~ ~$$8.6$$  What is the lowest score the final judge could award for Ellie to win?  ~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Word Problem Modules->Average Problems ->Using Formulas->Finding the Average Directly