$(20$pes$)$ Write the assembly language instructions to add two $16-$bit numbers. The first one is $3$ CE$7$ second one is $3$B$8$DH$.$ The first one is in internal memory location $40H$ and $41H,$ and the second is is $42H$ and $43H.$ The most significant digits are in locations $40H$ and $42H.$ The sum is to be stored i byte$)$ and $R1($low byte$).$ what are the contents of $R0$ and $R1?$