Part 1: Exercise 2
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*	Understand the difference between VmSize and VmRSS.
*	Compile and run all the programs in this directory one by one.
*	Find out VmSize & VmRSS of each program before the program terminates.
*	Compare  the memory usage of these programs in terms of VmSize & VmRSS
        and justify your results based on the code.
