Adding hw04
Adding hw04

thuctran289/ExercisesInC,JosephLee19/ExercisesInC,thuctran289/ExercisesInC,NathanYee/ExercisesInC,ejprice54321/ExercisesInC,shanek21/ExercisesInC,apurvaraman/ExercisesInC,sarahwalters/ExercisesInC,JosephLee19/ExercisesInC,cmoser96/ExercisesInC,sarahwalters/ExercisesInC,AllenDowney/ExercisesInC,shanek21/ExercisesInC,RachelYang02/ExercisesInC,apan64/ExercisesInC,RachelYang02/ExercisesInC,NathanYee/ExercisesInC,Margaretmcrawf/ExercisesInC,AllenDowney/ExercisesInC,joeylmaalouf/ExercisesInC,NathanYee/ExercisesInC,NathanYee/ExercisesInC,cmoser96/ExercisesInC,apurvaraman/ExercisesInC,ejprice54321/ExercisesInC,joeylmaalouf/ExercisesInC,thuctran289/ExercisesInC,AllenDowney/ExercisesInC,apan64/ExercisesInC,Margaretmcrawf/ExercisesInC