Undergraduate / Early riser / College options ('letter to roommate' / 'Why Stanford is good for you') [7]

I think you can add more to your "letter" prompt. It has a good, solid start, but I feel you can provide more depth to ti.

Writing Feedback / "It's more than a cup of coffee" - ENG grammar [5]

The problem with your essay, is that you take a too literal. The essay is not asking for a description of coffee.