Declaration of Independence and the US Constitution

As homework, write a response to this questions:

1- Compare the function of the Declaration of Independence and the US Constitution?  Do you observe any relationship between the two documents?

2-After reading both the Declaration of Independence and the Constitution of the United States, what themes do you see reoccurring in both documents?

write the answers with your way NO PLAGIARISM …  I am an International student from Saudi Arabia so Please easy wording.