Two different brands of milk are randomly sampled, and the fat content in each bottle ofmilk is determined. Twenty-six bottles of Brand A milk yielded an average fat content of X bar1 = 25 grams with s1^2 = 4, and thirty one bottles of Brand B yielded an average fat contentof Xbar2 = 25.8 grams with s2^2 = 7. Test the hypothesis that both brands have identical average fat content at the 5% level of significance.