Cartel, one of the forms of monopoly organization, refers to capitalist enterprises in the same production sector, with the purpose of obtaining monopoly high profits and strengthening their position in the competition, and signing agreements with each other on the sales market, commodity output and commodity prices. A monopoly alliance formed by agreements and the exchange of licenses for new technologies. According to the above definitions, Which of the following are not cartels:. ['In the same production department, each producer signs an agreement that specifies the regional scope of the sales market.', 'In the same production sector, each producer signs an agreement specifying the monopoly price of a commodity.', 'In the same production sector, stronger producers purchase 80% of the equity of weaker producers at a price higher than 20% of the market.', 'In the same production department, each producer signs an agreement stipulating a certain quantity of goods to be produced and sold, and requires each participant to comply.']