$1.$What is the value of the program counter in the machine described in Appendix C

immediately after executing the instruction BOCD?

$2.$The following are instructions written in the machine language described in

Appendix C$.$ Translate them into English.

a$.7123$

b$.40E1$

c$.$ A$304$

d$.$ B$100$

e$.2BCD$

$3.$ Translate the following instructions from English into the machine language

described in Appendix C$.$

a$.$ LOAD register $6$ with the hexadecimal value $77.$

b$.$ LOAD register $7$ with the contents of memory cell $77.$

c$.$ JUMP to the instruction at memory location $24$ if the contents of register $0$

equals the value in register $A.$

d$.$ ROTATE register $4$ three bits to the right.

e$.$ AND the contents of registers $E$ and $2$ leaving the result in register $1.$

$4.$ Suppose the memory cells at addresses $00$ through $03$ in the machine described in

Appendix C contain the following bit patterns:

a$.$ Translate the first instruction into English.

b$.$ If the machine is started with its program counter containing $00,$ what bit

pattern is in register $6$ when the machine halts?