answer: Jack advises #Person1# to change the beginning and add work experiences in the second part of the letter.
documents: #Person1#: Jack, would you please read this letter I've just written? I'd like to have your opinion.
  #Person2#: I'd be glad to tell you what I think.
  #Person1#: If you don't think it's any good, please say so. I really want to get this job.
  #Person2#: It looks fine to me. But I have one suggestion.
  #Person1#: What is it?
  #Person2#: If I were you, I'd change the beginning. You should write about your education first.
  #Person1#: Good idea, Jack. What do you think about the second part?
  #Person2#: Well, I'm afraid it's too short. You should include much more information about your work experience.
  #Person1#: You're right. I'll change it.