new_contents: import jimbobimport unittestdef three_times_x_plus_two(x):    y = jimbob.threetimes(x)    if y is None:        return None    else:        return y + 2class MyTest(unittest.TestCase):    def test(self):        self.assertEqual(three_times_x_plus_two(3), 11)        self.assertEqual(three_times_x_plus_two(3.1), 11.3)        self.assertEqual(three_times_x_plus_two("a"), None)
  
subject: Create janebob.py