1. Professor Box wants to test to soil quality of 10 nearby fields. He takes a soil sample from each field and studies the samples. Is this an experiment or an observation? 2. Professor Box wants to see the effect of a new herbicide on soil. He treats 5 fields with the herbicide and leaves 5 fields without the herbicide. After 2 weeks, he takes a soil sample from all 10 fields and studies the samples. Is this an observation or an experiment? 3. In a recent survey, lowans were asked what influences their voting the most. 34% said views on taxes, 30% said views on education, 17% said views on same-sex marriage, and 16% said views on gun control. Could this information be represented by a circle graph? Why or why not