If i am writing a three and a half to four page essay, how many quotes from the text i am analyzing would be reasonable?

So long as men can breathe or eyes can see, so long lives this, and this gives life to thee. —"sonnet 18," william shakespeare in one to two sentences, explain the central idea of the final couplet of the poem.

You suspect that this article has left out some facts that might lead the reader to believe that someone else made the star-spangled banner. what is the best way to verify this? by consulting a variety of sources by disregarding the article entirely by writing a letter to the editor of the publication that printed the article by reading various historical accounts by verifying the opinions

Will give read the sentence: (blank) starting to rain outside. which is the best word to complete the sentence? a : its b : its’ c : ’tis d : it’s