Emotional recollection in tranquility....plz help

Here is a question that i jus can't find an answer for.
Poetry is 'emotionally recollected in tranquility'.How do the following poems of wordsworth support the statement:
1.London,1802
2.A slumber did my spirit seal
3.Tintern Abbey
4.The solitary Reaper
I have been asked to write an 800 words essay on each poms link with the quote with supported proof from the poem.I have only figured out Please help me.My assignment's due on Monday.If i have posted my question in the wrong forum then please forgive me for I am new here and i will avoid this in future.At the moment plz help.