6. A sample of 14 cans of Brand I diet soda gave the mean number of calories of 23 per can with a standard deviation of 3 calories. Another sample of 16 cans of Brand Il diet soda gave the mean number of calories of 25 per can with a standard deviation of 4 calories. a) At the 1% significance level, can you conclude that the mean numbers of calories per can are different for these two brands of diet soda? Assume that the calories per can of diet soda are normally distributed for each of the two brands and that the standard deviations for the two populations are equal. b) Now use the p-value approach and test the same hypothesis. What is your conclusion at the 1% significance level