Dr. Marvi has decided to start a soil improvement company with his worm-inspired robots. He places the robots in three test fields and has them burrow through the soil, turning it over and aerating it. In the first field, the soil is very sandy; in the second field, the soil is rich and loamy (perfect for growing vegetables); the third field contains a lot of clay. Each field is set up with 30 robot worms (see below). After several weeks, Dr. Marvi tests the quality of the soil. Here are his results: Sandy Loamy Field Clay Field Total Field Successful 20 17 13 50 Aeration Unsuccessful 10 13 17 40 Aeration Total 30 30 30 90 1. Of the three fields, which (if any) were the robots significantly more successful? (10 points) 2. For the test you performed, have the assumptions been adequately met? Explain. (10 points)