Following is the schedule A for transactions Ti, T2, and T Schedule A tian T2 T3 writ read(Z) read(Z) read(Z) 6 Writ rea write(%) read(X) 10 read(Y) 1) Assume that the system crashes at time 8, what should be done to recover the system? (3 marks) 2) Assume a checkpoint is made at time 7, what should be done to the three transactions when the crash happens at time 8? (3 marks) Note: We assume a transaction will be committed immediately after all the read/write operations of it are done