Consider the following data for a two-factor experiment:

a. Based on the sample data, do factors A and B have significant interaction? State the appropriate null and alternative hypotheses and test using a significance level of 0.05.
b. Based on these sample data, can you conclude that the levels of factor A have equal means? Test using a significance level of 0.05.
c. Do the data indicate that the levels of factor B have different means? Test using a significance level equal to 0.05.