This question is NOT related to the previous questions. Given below are two transactions T$1$ and T$2.$ Here T$1$ and T$2$ are NOT in a SCHEDULE. We only show them as two separate transactions.

T$1$

Read$($A$)$

Read$($B$)$

write$($A$)$

Write$($B$)$

Read$($D$)$

Write$($D$)$

T$2$

Read$($C$)$

Write$($C$)$

Read$($A$)$

Read$($D$)$

Write$($A$)$

Your task: Upload a file containing your HAND$-$WRITTEN answer to the following question:

ADD lock$\_$S$,$ lock$\_$X$,$ and unlock statements of appropriate lock MODE to the above $2$ transactions according to the two$-$phase locking protocol. Show the resulting transactions T$1\text{'},$ T$2\text{'}.$ You do NOT need to show T$1\text{'},$ T$2\text{'}$ in a schedule, just list each one of them as a modified transaction with the added locking$/$unlocking statements.

Write your NAME on the sheet with your answers. One point will be deducted if your answer is not hand$-$written or your name is missing.