Khloe and her children went into a movie theater where they sell bags of popcorn for $7 each and candies for $4 each. Khloe has $60 to spend and must buy no less than
11 bags of popcorn and candies altogether. If a represents the number of bags of
popcorn purchased and y represents the number of candies purchased, write and
solve a system of inequalities graphically and determine one possible solution.