Question: Change transaction T 2 in Figure 21.2b to read: read_item(X); X:= X+M; if X > 90 then exit else write_item(X); Discuss the final result of

Change transaction T 2 in Figure 21.2b to read:
read_item(X);
X:= X+M;
if X > 90 then exit
else write_item(X);
Discuss the final result of the different schedules in Figure 21.3 (a) and (b), where M = 2 and N = 2, with respect to the following questions. Does adding the above condition change the final outcome? Does the outcome obey the implied consistency rule (that the capacity of X is 90)?

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