Fisher's famous iris dataset (1936) includes 50 observations each of 3 types of iris plants: Setosa, Virginica, and Versicolor. Among other attributes, the sepal length (in cm) was recorded for each observation. The average sepal length for each type of iris plant is given below: Setosa: 5.006 cm Virginica: 6.588 cm Versicolor: 5.936 cm Note: For this data, SSW = 38.96. (a) Write down and explain the ANOVA model. (b) Perform an F test to assess whether the sepal lengths are the same for all three types of iris plants. Use x = 0.1.