Essays / How to write a Memo? An intro to the criminal Law. [5]

How do I write a memo requesting feedback on an essay? How should i start and what should I include. A sample would be very helpful. Thanks in advance.

Essays / Memo appreciating someone for giving me assistance with my essay [4]

I need to send someone a memo thanking them for feedback on my essay. How would I start and what should I include. A little sample would be very helpful. Thank you in advance. Also, what kind of feedback is good? If I had to send some feedback without sounding rude?