Please help me to write a statement of purpose. I will apply for graduate school next year. I contacted with one professor named Dr. Brown in texas tech university. 
This is the requirement for the statement of purpose.
1. What do you want to study at graduate school?
2. Why do you want to study it?
3. What experience you have in your field?
4. What you plan to do with your degree once you have it?
Here is also other specific requirements for this statement.
Explain a little more about your goals going forward, and specifically how you see those goals fitting into this professor existing research program (see my lab website www.amvbrown.com).
Thank you.
I will attach my CV and one specific program description. This specific program description was written by my supervisor in Dr. Asano`s Lab which I worked this semester. This information may be used in the "What experience you have in your field" part.
Please read the publications from Dr. Brown, and then write this part "specifically how you see those goals fitting into this professor existing research program". 
If I have another idea when you write, I will attach the word document through link.