For applying the filter you need to select the data on which you want to apply it so it will allow you to look at only data you select from the filter options.
How much in comparison to the rest a percent
Answer:
The get() method of the ArrayList class accepts an integer representing the index value and, returns the element of the current ArrayList object at the specified index. Therefore, if you pass 0 to this method you can get the first element of the current ArrayList and, if you pass list.
I'm pretty sure it's can be used in rural and remote areas, not 100 percent but seems right