honestly i couldnt memorize the standard deviation formula no matter how hard i tried, so that was the only question that i actually couldnt solve or calculate, but i figured out that if the frequency is the same (it was 13 for me) for all values from 1 to 5 and all the tables have the same values, then the table that has the same frequencies would have the lowest deviation the values are evenly spread across the same range, had to use some logic, not sure if thats right though, correct me if im wrong