Answer the following the questions based on the code snippet below:

void loop$()$ i

$//$ Set motor A speed and direction

analogWirite $($enA$,150)$; $//$ Speed control $(0-255)$

digitalWrite $($inl$,$ HIGH$)$ ;

digitalWrite$($in$2,$ LOW$)$;

$//$ Set motor B speed and direction

analogWrite $($enB$,150)$; $//$ Speed control $(0-255)$

digitalhrite$($in$3,$ HIGH$)$;

digitalWrite$($in$4,$ LOW$)$ ;

$\}$

a$)$ Create a variable called motorspeed that will store the speed of the dc motors. Rewrite the code above so that the variable is substituted for the value $150$ and the motors are spinning in the opposite directions.