Question 3 (1 point) Listen Read the statistical question and study design. Determine if it is a survey, experiment, or observational study. Do dogs who eat Purina dog food have more health problems than those who eat a variety of food brands? A veterinarian randomly selects 50 dogs to feed Purina dog food for one year and 50 dogs to eat other dog foods for one year. The dogs' health is measured over the course of the year. O Experiment Survey Observational StudyQuestion 4 (1 point) 40 Listen Explain whether the research topic is best addressed through an experiment or an observational study. Then explain how you would set up the experiment or observational study. Does second-hand smoke affect the health of pets? Observational Study Randomly select 100 pets from a list at a local veterinary office. Then ask the owners of 50 of the pets to start smoking, if they do not already, for a period of six months. As the owners of the other 50 pets to not smoke for a period of six months. Monitor the health of the pets in both groups at regular intervals. Observational Study Randomly choose one group of pets who are already exposed to second-hand smoke. Then randomly choose another group of pets that are not exposed to second-hand smoke. Monitor the health of the pets in both groups at regular intervals. Experiment Randomly choose one group of pets who are already exposed to second-hand smoke. Then randomly choose another group of pets that are not exposed to second-hand smoke. Monitor the health of the pets in both groups at regular intervals. Experiment Randomly select 100 pets from a list at a local veterinary office. Then ask the owners of 50 of the pets to start smoking, if they do not already, for a period of six months. As the owners of the other 50 pets to not smoke for a period of six months. Monitor the health of the pets in both groups at regular intervals. Question 5 (1 point)