Make three short-answer practice questions from the numbered notes below. Use only these notes. For each question, provide an answer key and the supporting note IDs. Include one question that combines two notes. Put questions first and the answer key afterward so I can cover it. Flag missing information separately. Do not invent facts, assess my ability or promise a learning result.

Original practice notes about a fictional community tool library:
N1: Members can borrow up to two tools at a time.
N2: The normal loan lasts seven days.
N3: A renewal is allowed only if nobody has reserved the tool.
N4: Damaged tools should be returned to the desk with a note describing the problem.
N5: Opening hours are not recorded in these notes.

Make the combined question about keeping a borrowed tool longer. Do not infer opening hours or late fees.