I need help with questions 5 and 6 please! I don’t December 28, 2016 By Essaypros I need help with questions 5 and 6 please! I don’t understand cumalativf proportions and finding values of z. The questions are in the pic. We Deliver Top Quality On Time As Promised! Ready to get started? Just click the button to be directed to a secure page so you can enter the details of your paper.