Write an assembly program to achieve the addition of two numbers entered to port B and display the result on port A$.1.$We use the method of masking to separate the two numbers, since the first number is in the LSB of PORTB and the second number is in the MSB$,$ we separate the first number using the instruction ANDLW $0$X$0$F$,$ and the second number using the instruction ANDLW $0$XF$0.2.$ After that before we add the two numbers, the first number is ready for addition but the second number needs to be swapped, so we use the instruction SWAPF F$,$d to swap it $($swapping means F$(0$:$3)=$ F$(4$:$7),$ F$(4$:$7)=$ F$(0$:$3)).3.$ After that we add the two numbers using the instruction ADDWF F$,$d and then we display the result on PORTA