i need help with a religious essay

My topic is Psalms 136.

When writing your 500 word essay, address the following (whichever ones apply to your topic): What is this Psalm about (give a brief summary, but your essay needs to be more than just a summary)?  What theological themes are present?  Is the Psalm split into identifiable sections, and if so, what are they?  Does the Psalm mention previous events in Israel’s history (and why is this significant)?  Are there any prophecies that talk about the future?  Lastly, I want all students to comment on what literary devices are present in their Psalm.  Specifically, what type(s) of parallelism (synonymous, antithetical, synthetic) do you notice, if any?--give specific examples from your psalm explaining how the verse(s) fit into its category.  Are there any instances of acrostic or repetition of a key word?