Janice is making a chocolate and nuts snack for her son's soccer team.Janice is going to mix some dark chocolate chips with walnuts and put them in bags for the kids.The chocolate chips have 150 calories per ounce and the walnuts have 190 calories per ounce.Janice is going to make a 3-ounce snack for each soccer player.The team has a rule about snacks at games.The snacks must be no more than 500 calories.How many ounces of chocolate and how many ounces of walnuts should Janice use to make a 500 calorie, 3-ounce serving of chocolate and walnuts?