Hi I have to tell you But I also use Flvs Open lesson 01.07 and read it I promise you will find something of how to do it because I had the same prob and after reading the lesson and awnsering the quetion I GOT A 100 hope i help you
So A = the child is 5-10 years old and B = the child is 11-13 years of age and that covers all the children in the study. I = calcium intake is inadequate.