points$)$ Given $8-$bit instructions, we want to design an expanding opcode to allow the following to be encoded.a$)$ Show and list all the encoded instructions with opcode value. $($Use xxx or xxxx for operand field$($s$).)3$ instructions with two $3-$bit operandsXXXXXX,xxxxxx$,$ andXXXXXX $2$ instructions with one $4-$bit operandxxxx andXXXX $4$ instructions with one $3-$bit operandXXX,XXX$,$xxx$,$ andXXXb$)$ Based on your answer of a$),$ what is the opcode value of the following $8-$bit machine instruction?$11101001$Opcode value is