2.2 (10 points) The following data were generated from a 2 2 factorial experiment with 3 replicates, where factor A levels represent two dierent injection procedures of an anesthetic to the occipital nerve (located in the back of the neck), and factor B levels represent two dierent drugs, which physicians recommend to increase the eectiveness of the injections. Three migraine patients were randomly selected for each combination of injection and drug. Source of variation SS df MS F F critical Factor A * * * * * Factor B * * * 13 * Interaction 1.333 * * * * Error * * 4.333 * * Total 97.667 11 a. Fill in the missing values (identied by asterisks) in the above ANOVA Table. b. Test at the 5% signicance level to determine if factors A and B interact. c. Test at the 5% signicance level to determine if dierences exist among the levels of factor A. d. Test at the 5% signicance level to determine if dierences exist among the levels of factor B