Recursion must be used otherwise assignment gets a zero. Must be in LC-3 assembl

Recursion must be used otherwise assignment gets a zero. Must be in LC-3 assembly language program. Instructions are very thorough and everything that is required is in the instructions. I am an undergrad so please don’t use too advanced methods. One of the files ill attach will have the instructions we use.
The first file is some code and comments provided, the second file is the actual assignment instructions, and the last file is some of the instruction we use.