Question: Write a subroutine at address 0x100 in PIC18F assembly language program to find the square of a BCD digit (0 to 9) using a lookup table. The subroutine will store the desired result in WREG based on the BCD digit stored by the main program. The lookup table will store the square of the BCD numbers starting at program memory address 0x300. Also, write the main program at address 0x200 that will initialize STKPTR to 0x30, store the BCD digit (0 to 9) in WREG, call the subroutine, and stop. Use indexed addressing mode.