Define crumbing and appetizer. $(4$pts$)$Why should you avoid scraping and stacking dishes at the table in front of the guest? $(4$pts$)$How should you handle the complaint when a guest says: $(8$pts$)$a$.$ The food is cold! b$.$ My steak is too rare! c$.$ The chili is too spicy! d$.$ You spilled coffee on me$!$