Mental Block at its Finest

I've been staring on the MS Word screen for what seemed like a long time now. Thirty minutes? One hour? Three hours? I haven't kept track of time. Albeit it is absolutely stressing and irking whenever mental block would intervene while I was writing my novel, the problem will be more massive when it decides to attack when I'm supposed to write an assignment.

I need to write a letter for my expert interview, and it's due on the 19th. My brain is bleeding, clueless, and desperate to have this work done. Unfortunately, though, I just can't. What am I supposed to write, anyway? How was I supposed to converse with an "expert"?

Seriously. Ask me to write a poem, an essay, or even a short story. But not a formal letter.