The data for gas mileage (in mpg) for four different types of vehicles was compared. For type of vehicle, en were chosen and gas mileage recored. The sample means are shown below. Vehicle type: 2 3 4 Sample mean: 28.5 31.5 24.9 33.1 Grand Mean = 29.50 Sample sd: 3.4 3.2 4.9 3.6 Part of the ANOVA table is shown here: Source DF SS MS Vehicle 3 391.20 130.40 Error 36 528.93 14.69 Total 39 920.13 Part a: Complete the ANOVA table by finding the value of f. Part b: Using a = 0.05, perform a significance test to see if at least two of the means are different. Part c: Use Tukey's method to determine which pairs differ significantly (a = 0.05)