For each of the schedules of transactions T1, T2, and T3 below:

c) r1(A);r2(B);r3(C);r1(B);r2(C);r3(D);w1(C);w2(D);w3(E);

d) r1(A);r2(B);r3(C);r1(B);r2(C);r3(D);w1(A);w2(B);w3(C);

i) Insert shared and exclusive locks, and insert unlock actions. Place a shared lock immediately in front of each read action that is not followed by a write action of the same element by the same transaction. Place an exclusive lock in front of every other read or write action. Place the necessary unlocks at the end of every transaction.

ii) Tell what happens when each schedule is run by a scheduler that supports shared and exclusive locks.