Write a subroutine to subtract two numbers that are stored in memory at 2 consecutive addresses. The address of the minuend is passed to the subroutine through the accumulator AC, while the resulted difference is passed back to the calling program through AC, as well.

Q3.1. Write the subroutine in assembly language using the instruction list of the basic computer. The starting address of the subroutine is HEX 100.

Q3.2. Write an example in assembly language for a main program that calls this subroutine. This program is stored in the memory starting with address 0.

please provide explanation