In a crashtest, cars are crashed at 35 mph. The response variable is a measure of head injury. Researchers want to know if which seat the dummy is in affects head injuryseverity, as well as whether the type of car affects severity. There are two different seats(driver, passenger) and six different size classifications(compact, light,medium, mini,pickup, van). Use the accompanying table and plots to answer partsa) throughc).

3.25 Driver 3.00 Seat Effect (severity index) Head Injury ( severity index) Passenger 2.75 2.50 Driver Passenger 2.1 Seat Compact Light Medium Mini Pickup Van Size 0.6 + 8 3.3 0,3 3.0 Size Effect ( severity index) Residuals (severity index) 2.7 0 2.4 -0.3 Compact Light Medium Mini Pickup Van Size 2.8 2.9 30 3.1 Predicted Values (severity index)Sum of Mean Source DF F-ratio P-value Squares Square Seat 0.90551 0.90551 26.186 <:0.0001 size seat x error total>