The lab I'm writing a report over involved four parts to the experiment. Should I set it up where each portion of the lab has its own section for the Materials and Methods, Results, and Discussion headings? Or should I discuss every material needed for all the experiments under one heading each? In case I didn't explain that clearly (I feel like I didn't), should I say "Materials and Methods Part A" and discuss only the first portion of the lab or just "Materials and Methods" and discuss every part (A-D) to the lab? Thank you!