A little help with shell script project

hi
i have a small project to do in shell script
the instruction are:
Create a script that analyzes HDD and memory files.

functions:

Getting the user input
The user enters mem or hdd, and for the second argument, the filename to
analyze

Function for each filetype
The script runs operations depending on the type of file (HDD/mem).
Available tools: binwalk, foremost, strings, bulk_extractor, volatility

Save results into a file
The file analysis should be saved in the created directory; once finished the file
operation, display the user with the analysis statistics

the script is approximately 70 lines

i already Wrote a script
i sent it to my teacher and he told that i have 2 problems

Your code has errors.
No automations using Volatility.

please if somone can help write a new script or fix mine I will be grateful
[link to my project]
https://github.com/MJ8523/fileanalyz...orenproject.sh