A farmer is ready to plow his fields and plant a crop. He decides to go to a local grocery store and survey every 10th customer that comes out to see what he should plant to make his crop more profitable. He surveys 39 people in the time he is at the store and he finds out the following: 10 people want tomatoes, 7 people want onions, 12 want potatoes, and 10 want watermelon. The town has 12,500 people in it. what is the sample and population of the survey? was the farmers sample random?​