Help please with correct solution! Question $9$

$1$ pts

With ASL $($Arithmetic Shift Left$),$ if we wanted to multiply register R$1$ by $8$ through Shifting Left, which of the following would be correct?

mov r$1,$ r$1,$ asl #$3$

mov r$1,$ r$1,$ asl #$8$

asl r$1,$ r$1,$ #$3$

None of the above