3) (20 pts) Consider the following lock requests in the table belovw Here, S(-) and X(-) stand for Shared Lock, and 'Exclusive Lock, respectively. Ti, T2, and T3 represent three transactions. LM stands for 'lock manager' and Transactions will never release a granted lock. time 3 t6 t7 S(B) S(C) X(C) LMg For the lock requests in above table, decide which lock will be granted or blocked by LM. Write 'g' in the LM row to indicate the lock is granted and 'b' to indicate that the lock is blocked (the lock acquisition fails). For example, in the table, the first lock (S(A) at time t1) is marked as granted with 'g'. Moreover, show your work to justify your