Geology- paleozoic | Geology homework help

this is a Historical Geology assignment:

The Paleozoic was a time that had many sea-level fluctuations – like what we are experiencing now. Read the attached journal article from Science Magazine.  and write a short paper (2-3 paragraphs) summarizing the report. Make sure to include, along with the summary: 

a timeline of the regressions and transgressions with approximate dates

what caused the regressions and transgressions (dont have to go into each one, can summarize)

how did land masses change with each fluctuation (using your own thinking)

what surprised you the most while reading this article?

works cited page

The article is attached.