a) Write a sequence of instructions to add an 8-digit BCD number in AX, BX to another 8 digit BCD number in CX, DX. AX, CX are the most significant registers. The results must be in CX and DX after addition. b) Write a series of instructions that will output FF to an output port located at address BOOOH of the I/O address space. c) Data are to be read in AX from two input ports of each byte wide at addresses AAH and A9H respectively and then output as a word to a word-wide output port at address B000H. Write a sequence of instructions to perform this operation