input: Write a function to remove duplicates from a given list and sort them in ascending order.
  assert remove_duplicates_and_sort([2, 8, 5, 2, 6, 3, 4]) == [2, 3, 4, 5, 6, 8]
  assert remove_duplicates_and_sort([9, 9, 1, 2, 1, 3]) == [1, 2, 3, 9]
  assert remove_duplicates_and_sort([]) == []
  assert remove_duplicates_and_sort([7]) == [7]
  assert remove_duplicates_and_sort([3, 3, 3, 3]) == [3]
output: def remove_duplicates_and_sort(lst):
      return sorted(set(lst))