What should you capitalize in a sentence

Which two sentences in this excerpt from leo tolstoy's the death of ivan ilyich reflect the author's belief that russia's rising middle class was unable to express genuine emotion?

What is the common difference between successive terms in the sequencer 0.36,0 26,0 16,006, 0,04,0

Read the excerpt. by my junior year i lived on campus all year round. between sorority life, political activism, boyfriends, and modern dance i couldn't stop moving. i came home for brief visits, but these visits were too awkward without rosalind. the house was profoundly still. mommy stayed in her room. russell didn't talk, let alone look at me. the chess set was still standing there, pieces and all! how does the author's word choice create an ominous tone in this excerpt?