A water tank has steps inside it. A monkey is sitting on the top most step. (ie, the first step) The water level is at the ninth step.
(a) He jumps steps down and then jumps back step up. In how many jumps will he reach the water level?
(b) After drinking water, he wants to go back. For this, he jumps steps up and then jumps back steps down in every move. In how many jumps will he reach back the top step?