$4)$ Convert the following C code to assembler $($if$-$statements$)$

unsigned char A$,$ B;

A $=$ A & $0$x$07$;

if$($A $==0)$ B $=$ B $+1$;

if$($A $==1)$ B $=$ B $+3$;

if$($A $==2)$ B $=$ B $+5$;

if$($A $==3)$ B $=$ B $+7$;