Amelia is conducting a survey among people who travel to work using the public transportation system in her city. She wants to know how much time people spend using public transportation. She selected three samples for her study. Sample 1: 12 random members of the population who drive to work Sample 2: 12 random people who use public transportation to get to work Sample 3: 12 random people who drive to work and take public transportation on alternate days Which sample is most likely to give a valid generalization? Which is least likely to give a valid generalization