input: Write a python function to merge two lists and print their elements using zip.
  assert merge_and_print([1, 2, 3], ['a', 'b', 'c']) == ["1: a", "2: b", "3: c"]
  assert merge_and_print([4, 5], ['d', 'e', 'f']) == ["4: d", "5: e"]
  assert merge_and_print([], ['x', 'y', 'z']) == []
output: def merge_and_print(list1, list2):
      return [f"{a}: {b}" for a, b in zip(list1, list2)]