Please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please please it is very urgent
Answer:
1+3+5=equivalent resistance in series
9
as ammeter measure the current then by v=ir
9/9=I
1=current
then by v=ir
v=1*3=3 between q and r because current remain constant in series combination
similarly,v=9 between p and s