Ow did Postmodern art reach to the rise in popular culture of graffiti through 80s-2000?

These must be included:

1) Contents Page
2) Introduction
3) Body of Thesis with Headings or chapters
4) Conclusion
5) References
6) Bibliography

Also:
1)All pages must be numbered
2)use double-line spaced
3)the left-hand and right-hand margins at least 2.5cms
4)use Harvard referencing format

Thank you
There are 2 representative graffiti artists:

1)keith Harring
2)Basquiat

Books:

Soho Walls: Beyong Graffiti, David Robinson,
1990, Thames and Hudson published

Thank you