Consider the code in the picture:

What is happening between the two comments labeled POINT A and POINT B$?$ Write a brief description.

What happens if you compile the code and run it without any command line arguments? Explain what happens and why. Explain$/$why means you should include more details than simply identifying a symptom or cause.

Update the code to include a check after the call to malloc to verify that memory was successfully allocated $($and call exit$(0)$ if it was not$).$

Rewrite the code between the two comments labeled POINT A and POINT B to use realloc. Include a check to verify that memory was successfully allocated as you did with malloc in the previous step.