e$)$ Explain line by line the operation performed by the instruction and the resulting register values for registers RA$,$ RB$,$ RC$,$ RD of the program shown below. Write the value that is in the register after the execution of the instruction in the corresponding column; if the value is unknown indicated this with $"??".$ Assume we do not know the content of the registers on program start.

mov $ra,38h$

xor $rd,rd$

add $ra,rd$

$shrra$

asr $ra$

RA

$$

$.$

$.$

$.$

$.$

RB

$.$

RC

$\backslash$table$[[$RC$,$RD$],[.,.],[.,.],[.,.],[.,]]$

$[15$ marks$]$