Consider the following concurrent execution of database transactions T$1,$ T$2$ and T$3.$ The concurrent execution given above is not controlled by any scheduler.

Show a sample concurrent execution of the transactions T$1,$ T$2,$ and T$3$ that is controlled

by $2-$Phase Locking scheduler and the transactions interleave their operations in a way that

is the most similar to the concurrent execution given above.

To simplify the problem, assume that we use only a general concept of a lock and we do

not distinguish between shared locks and exclusive locks.

When visualizing a concurrent execution use a technique of two$-$dimensional diagrams