This question was asked almost a year ago, there is a very good chance that they're not even in school anymore, it's crazy to think about. A year ago, I was hesitant on wearing a mask for the first couple of times and was starting to get used to the changes that were soon to come, while this guy was here, begging people for answers to a question so he could pass highschool. Now, he's probably living his best life right now and doesn't even know what I'm typing right now, either that, or he's working at McDonald's. Honestly though, time flies by so fast though, it really is crazy.
15 minutes: you have to find how many minutes it takes for 1 gallon to leak which is 5, then you multiply that by 3 because thats how many gallons are left... and you get 15 min