Create a Python program (hw3.py) that simulates a Mark-Sweep garbage collection algorithm. In this program, named pointers are referred to using variable names such as p, stackPtr, temp3, etc. Heap blocks are referred to using integers. The program has the following functionality: Get the name of an input file from the command line (using sys. argv). WARNING: Do not prompt the user for a file name. Process the file. The first line will contain n number of heap blocks--the heap blocks will be identified using the numbers 0 through n - 1. Each subsequent line will contain an ordered pair either in the form : named pointer, heap block (example: p,10 means p points to heap block 10) heap block, heap block (example: 7,3 means heap block 7 points to heap block 3)