input: Write a python function to parse an XML file and print the title and author of each book.
  assert parse_books_xml('books1.xml') == [('Title1', 'Author1'), ('Title2', 'Author2')]
  assert parse_books_xml('books2.xml') == [('Another Title', 'Another Author')]
  assert parse_books_xml('books3.xml') == [('Title3', 'Author3'), ('Title4', 'Author4'), ('Title5', 'Author5')]
output: def parse_books_xml(file_path):
      import xml.etree.ElementTree as ET
      tree = ET.parse(file_path)
      root = tree.getroot()
      
      books = []
      for book in root.findall('book'):
          title = book.find('title').text
          author = book.find('author').text
          books.append((title, author))
      
      return books