A race condition occurs when multiple processes or threads read and write data items so that the final result depends on the order of execution of instructions in the multiple processes. a) b) Suppose that TWO (2) processes, P1 and P2 in a situation where both share the global variable num. Briefly explain the situation that requires P1 and P2 are in a race condition. [5 Marks] Briefly explain the concerns of operating systems from the situation in Question 3(a). [15 Marks] [Total : 20 Marks]