Ow does the theme Lonelinessbetween the main characters differ in The power and the glory and The quiet americanby Graham Greene

This is an Extended Essay with English B literature
(Iam not a native speaker, however bilingual)
It must have primary source and secondary source
How does the theme Lonelinessbetween the main characters differ in The power and the glory and The quiet americanby Graham Greene
-comparison between the two novels,
-What situation are they put in,(several in each novel)
-How do they cope (act) with the situation,
-Are they strong, or weak? evidence
-Use of language,
-many quotes
-avoid making two essays, (one on The power and the glory”, the other on The quiet americancombine both)
-must include abstract, introduction, body, conclusion, references