What transgressions do the main characters have in tears of a tiger with text evidence?

In "Tears of a Tiger" by Sharon M. Draper, the main characters experience various transgressions throughout the novel. Here are some examples with accompanying text evidence:

1. Andy Jackson: Andy deals with guilt and anguish after causing the death of his best friend, Robert Washington, in a car accident. This transgression haunts him throughout the story.

- Text evidence: "It was all my fault... I killed him. I killed Rob." (Chapter 1)

2. Tyrone Mills: Tyrone is struggling with guilt over not doing enough to save his friend Andy's life. He blames himself for not intervening when he found out Andy was depressed.

- Text evidence: "Because I ain't the pal I'm supposed to be, not to Andy, not now, maybe not ever." (Chapter 3)

3. B.J. Carson: B.J. feels remorse for pressuring Andy to drink alcohol on the night of the accident, as he blames himself for what happened.

- Text evidence: "I shouldn't have told him to drink like that. It wasn't my fault, but I still don't feel good about it." (Chapter 9)

4. Keisha Montgomery: Keisha faces the challenge of dealing with her boyfriend's depression and eventually realizes she could have been more supportive.

- Text evidence: "Maybe I could have been a little nicer to Andy. Maybe that would have helped." (Chapter 14)

These transgressions weigh heavily on the main characters, creating emotional turmoil and fostering personal growth throughout the book.