Since there aren't very many profoundly challenging technical topics in this weeks lab exercise, your writeup doesn't need to be very elaborate. Just sketch the setups, comment on anything unusual that happened, make any suggestions you might have for improvements or clarifications, and answer all of the assorted questions.
Try to tie things together with some kind of organizational or narrative structure, don't just draw pictures and write down numbers. Answers which require computation should contain at least an outline of how the result was obtained. When asked to "comment on" or "discuss" something, consider that to be a form of implied question and write a line or two on the topic.
Your writeup may be hand written or word processed, which ever you prefer.