$1.$ Hayley$$s car was struck by a drunk driver who failed to stop for a stop sign. Hayley$$s husband, Dave, was a passenger in Hayley$$s car. Dave was killed in the accident. Hayley was hospitalized for her injuries from the accident. Her medical bills totaled $$40,000.$ Hayley could not work for three weeks after the accident. Her lost earnings were $$9,000.$ Six months after the accident, Hayley was still experiencing severe back and neck pain. Hayley sued the other driver. The other driver did not have a valid driver$$s license or auto insurance because he had been arrested twice previously for driving while intoxicated.

a$.$ Hayley won the lawsuit because the other driver was found by a court to have been negligent. Explain how the four part test of whether an act is negligent was met in this particular case.