text: def print_linked_list(head):
      """Given the head of a linked list, prints the elements of the list in order."""
  
      # Set node equal to the head.
      node = head
  
      # Well node is truthy.
      while node:
  
          # Print the data of the node.
          print(node.data)
  
          # Set node to the next node.
          node = node.next
  