4. Identify which type of bias might be present in each of the following situations. Explain your reasoning, and suggest improvements to the method: (8 Marks) a. In order to determine how people feel about healthy food choices in the cafeteria, copies of a survey are left beside the cash register that can be picked up as students pay for their food. On the survey it asks for completed surveys to be dropped off in the office. In order to determine the popularity of a breakfast cereal, 100 people are surveyed: e 65 six-year-olds e 20 university students e 15 pensioners A questionnaire included the question "Do you agree with increased funding for drug-addicts?" Another questionnaire includes the question "On a scale of 1 to 5, how much do you like mathematics?"