Determine if the firms involved in the following scenario are part of a cartel or colluding: Most hot dog carts in a city sell hot dogs for $3.00 each. Each stand makes comparable products, but each is independently owned and operated. The marginal cost of selling hot dogs on the street is around $1.00, but owners have maintained the $3.00 price point for several years. The cart owners are not in regular contact. Hot dog vendors in this city O have formed a cartel. O are colluding tacitly with one another but not as part of a cartel. O are acting competitively since they cannot change the going price of hot dogs. O are acting competitively since they have maintained prices for several years