@ccxclife
(Take this advice with a grain of salt)
Oh yeah in response to your later question: yes. Definitely mention that somehow. I’m not sure what you’re a fourth of, or how much of a connection you have with your culture, but try mentioning what you know. Write about the culture that ties(if you identify) you with it and any customs or traditions you do that might be interesting.
For me, I’m half Liberian. I mentioned in my essays how growing up with both my mom(an American) and dad(a Liberian) have impacted my world views. I also talked about how both of their perspectives have made me approach life differently. You don’t have to do something similar to what I did or talk in depth about your racial background. However, it probably wouldn’t hurt as prep schools try to make diverse students bodies.