input: Write a function to sort an array and measure the time taken using time module.
  assert sort_and_measure_time([13, 18, 25, 1, 7, 23, 12]) == ([1, 7, 12, 13, 18, 23, 25], 'Time taken: ')
  assert sort_and_measure_time([5, 3, 8, 6, 2, 7, 4, 1]) == ([1, 2, 3, 4, 5, 6, 7, 8], 'Time taken: ')
  assert sort_and_measure_time([10, 5, 2, 3, 8, 6]) == ([2, 3, 5, 6, 8, 10], 'Time taken: ')
output: import time
  
  def sort_and_measure_time(arr):
      start_time = time.time()
      sorted_arr = sorted(arr)
      end_time = time.time()
      time_taken = end_time - start_time
      return sorted_arr, f"Time taken: {time_taken:.10f}"