A man on a boat is sitting 8 feet above sea level. A seagull flies at an altitude of 52 feet above sea level, and a shark swims at an altitude of 8 feet below sea level. The ocean floor sits 75 feet below the surface of the ocean. Write an expression that represents the distance between each of the following and determine the distance:
Between the bird and the man
Between the bird and the ocean floor
Between the shark and the ocean floor