5. Graduate Student Question (100 points): This statement is true: Not all serializable schedules are allowed by 2PL. Can you show an example of this (30 points). From this example, generalize to all cases where this happens (70 points) 5. Graduate Student Question (100 points): This statement is true: Not all serializable schedules are allowed by 2PL. Can you show an example of this (30 points). From this example, generalize to all cases where this happens (70 points)