Questions are referring to commands in a Linux Virtual Machine terminal. Please answer all three parts, a, b, and c!

1) Suppose that the following C source code testprog.c is compiled into an executable file testprog.

testprog.c code is below:

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int main(int argc, char **argv) { char **p = &argv[2]; printf("%d %c %c ", argc, *(*p + 3), **(p + 3)); return 0; }

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a. If you run testprog with the arguments below, it should output 7 g n, as shown: $ ./testprog This program has many nasty bugs 7 g n Explain in full detail why it is printing the three letters 7, g, and n.

b. Next, you will get a different output (an error) if you run the same program as follows: $ ./testprog Test Explain your program output in this case, and why it differs from the previous case.

c. Finally, still another output is seen if the program is run without any arguments: $ ./testprog If your error from the previous part went away, can you explain why?