List three general symptoms of a mental disorder

Bob smoked for six decades before being diagnosed with chronic emphysema. his symptoms have now progressed to a point at which his day-to-day activities are drastically restricted, he must use supplemental oxygen, and his wife has to "take care of everything." he realizes he is dying, and feels ashamed for not having quit smoking when he was young. he also feels guilty and worthless because of his dependency on his wife. which stage of the kübler-ross model is bob experiencing?