Could you please assist me with this question?

thanks in advance,

10. The driver of a diesel-powered automobile decided to test the quality of three types of diesel fuel sold on the area. The test is to be based on miles per gallon (mpg). Make the usual assumptions, take or = 0.05, and use the following data to test the null hypothesis that the three means are equal: Brand A: 38.7 39.2 39.2 40.1 38.9 Brand B: 41.9 42.3 41.3 Brand C: 40.8 41.2 39.5 38.9 40.3