Help me write the perfect college entrance letters by these questions?

Hi, I will give a brief introduction/ things that are related to each question for me but i just need a well written and advanced answers to each questions. Thank you i really want to attend my dream University.

• 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.
  • I am prepared because i work hard in my education and strive to the top. I will not give up on achieving my dream of becoming a dentist in the future and i will not stop even when the courses are unbarring or hard. I have prepared on my success by working hard and doing great in my courses. (you can change it to sound perfect)
• Describe an example of your leadership experience in which you have positively influenced others, helped resolve disputes, or contributed to group efforts over time.
• Every person has a creative side, and it can be expressed in many ways: problem solving, original and innovative thinking, and artistically, to name a few. Describe how you express your creative side.
• What would you say is your greatest talent or skill? How have you developed and demonstrated that talent over time?
• Describe how you have taken advantage of a significant educational opportunity or worked to overcome an educational barrier you have faced.
• Describe the most significant challenge you have faced and the steps you have taken to overcome this challenge. How has this challenge affected your academic achievement?
• What have you done to make your school or your community a better place?
• Beyond what has already been shared in your application, what do you believe makes you stand out as a strong candidate for admissions to the University of California?