NSArray<NSNumber *> *numbers =
@[@2, @3, @5, @7, @11];
NSArray *first2 = [numbers
subarrayWithRange:NSMakeRange(0, 2)];
//first2 is [2, 3]
NSArray *last3 = [numbers
subarrayWithRange:
NSMakeRange(2, numbers.count - 2)];
//last3 is [5, 7, 11]