Please help!! This needs to be in hex

This is what we have so far but the output should be 6 and not 2

15. Write a machine-language program to add the three numbers 2, -3, and 6 and output the sum on the output device. Write it in a format suitable for the loader and execute it on the Pep/8 simulator. 16. Write a machine-language program to input two one-digit numbers, add them, and output the one-digit sum. Write it in a format suitable for the loader and execute it on the Pep/8 simulator