Idrive at a speed of 40km/hr. i can drive 50% farther in 50% less time if i increase my speed to a: 60km/hr b: 80km/hr c: 120km/hr d: 160km/hr

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters