Exercise 1. Do the following transactions follow the two-phase locking scheme. If not, convert to comply with the scheme. 12: TI: read lock xx write-lock (Y): rend-item(Y Y-Y+M write_item (Y): unlock (Y); read item Oy write-lock (XX. X:-X+N: unlock x); readlock (Y) read item(Y): write-lock cx XX+Y writem unlock ex, unlock CYX T3 write lock (YX read-item(Y): Y-Y+M: write item(Y): read lock (Y): write-lock (XX X:-X+Y: unlock (Y: write-item (X: unlock (x): VIVA