. Morning rush hour begins as doors open at the local Starebacks To Go, and there is only one server available. (That server can handle up to three orders simultaneously.) The first customer enters at 0:01, and a new customer enters every minute thereafter. It takes 58.5 seconds for a customer who orders only coffee, perhaps with milk and sweetener, to be served, pay for it and leave It takes 148.5 seconds for the same steps for a customer who orders a double decaf blended latte beverage. Customers leave immediately thereafter. So, one second after thirty minutes of rush hour have ended, how many customers are then in the store (a) if everyone who arrives orders coffee, or (b) if coffee, then latte, customers have alternated in arriving? At 30:01, (b) _______ (c) _______ customers are in line.