I would really appreciate help with my appetizers. We are having an hour-hour and a half cocktail hour with 200 people. We are having Bruchetta with tomato, basil, and mozzarella, melon and prosciutto skewers, different types of cheeses and crackers, caprese salad, and watermelon skewers. We are doing it all ourselves and the problem is I am not sure how much of each to make to have enough. There will be about 150 adults and about 50 children ( I don't know if that really matters). Thanks