In the following scenario, identify the null and alternative hypothesis. The mean lasting time of two competing roofing shingles, from company 1 and 2, are to be compared to see if company 2 has longer lasting shingles than company 1. Eighteen roofs are randomly assigned to test each type of shingles. Both populations have normal distributions with known standard deviation.

Select the correct answer below:

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