Please write an IRAC answer to the following tort essay question.

Abel and Baker were working on a scaffold lawfully erected over a public sidewalk. Abel, contrary to an express rule of his employer, was not wearing a hard hat.

While trying to park her automobile near one of the supports of the scaffold, Diana maneuvered it into such a position that she knew there was a risk of knocking the scaffold down if she backed without someone to guide her. She appealed for help to Sam, a stranger who was passing by. Sam just laughed. Angered, Diana proceeded to back her automobile without assistance and knocked a support out from under the scaffold, causing Abel and Baker to fall.

Abel severely fractured his skull and was taken unconscious to a hospital. If he had been wearing his hard hat, he would have suffered only a slight concussion with minimal disability.

Baker sustained a fracture of a vertebra, but he was able to walk and felt only slight pain. The fracture could have been easily diagnosed by x ray, and a medical doctor of average competence could have successfully treated it by immobilization. Instead of visiting a physician, Baker worked the rest of the day. While driving his car home later that day, Baker stopped at an intersection and his car was struck from the rear by a car driven by Ed. The collision caused only slight damage to Baker's car, but it was sufficiently severe to aggravate the fracture in Baker's back, resulting in paralysis.

Diana and Sam settled Baker's claim against them and received general releases from him. Able sued Diana and Sam. Baker sued Ed. Assume that Diana, Sam and Ed raise all appropriate defenses.

1. What rights, if any, does Abel have against Diana? Sam? Discuss.

2. What rights, if any, does Baker have against Ed? Discuss.

Optional Information:
Country relating to Question: United States