Identify the sampling method: simple random, cluster, stratified, convenience, or systematic. 1- Every fifth person boarding a plane is searched thoroughly. 2- At a local community College, five math classes are randomly selected out of 20 and all of the students from each class are interviewed. 3- A researcher randomly selects and interviews fifty male and fifty female teachers. 4- A researcher for an airline interviews all of the passengers on five randomly selected flights 5- A community college student interviews the first 100 students to enter the building to determine the percentage of students that own a car. 6- A market researcher randomly selects 200 drivers under 35 years of age and 100 drivers over 35 years of age. 7- To avoid working late, the quality control manager inspects the last 10 items produced that day. 8- The names of 70 contestants are written on 70 cards, The cards are placed in a bag, and three names are picked from the bag. 9- To ensure customer satisfaction, every 35th phone call received by customer service will be monitored. 10- A pregnancy study in Chicago, randomly selected 25 communities from the metropolitan area, then interviewed all pregnant women in these communities