In the following scenario, identify the null and alternative hypothesis. Two potato chip brands, 1 and 2, are being compared to see if they have the same number of calories. Twenty bags of each brand are randomly sampled and the number of calories per serving are measured. Both populations have normal distributions with known standard deviation.

Select the correct answer below:

1. H0:1=2; Ha:1<2
2. H0:1=2; Ha:1>2
3. H0:1=2; Ha:1<2
4. H0:1=2; Ha:12
5. H0:1=2; Ha:1>2