Science Buddies: "Ask an Expert"

Please will someone show how to answer questions 1(d) and 1(e) please?! Any help will be much appreciated!! (Questions are attached below)

Hello. This looks like homework questions, and this forum is meant to help students with their science fair project. If this is related to a project, tell us more about it. Otherwise, there are other forums more appropriate to help with homework.

Thank you.