How do you solve age word problems

How do you solve a question like this?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

Jo divides a candy bar into eight equal pieces for her children to share she gives three pieces to sam three pieces to leslie and two pieces to margie rose the two month old baby does it doesn't get any what fraction shows how muchw candy each of the four children got. what's the answer to my question