Essay for UC application

Please feel free to tell me to rewrite it if you feel that this essay is not good enough for the application for UC California:
1) Please describe how you have prepared for your intended major, including your readiness to succeed in your upper-division courses once you enroll at the university.

2) What would you say is your greatest talent or skill? How have you developed and demonstrated that talent over time?

3) Describe how you have taken advantage of a significant educational opportunity or worked to overcome an educational barrier you have faced.

4) What have you done to make your school or your community a better place?