What is the gravitational potential energy of the ball when it reaches its highest point

Ibelieve your answer is b.hope this : )

Nps pollution is caused by rainfall or snowmelt moving over and through the ground. nonpoint source pollution can include: excess fertilizers, herbicides and insecticides from agricultural lands and residential areas. oil, grease and toxic chemicals from urban runoff and energy production

What even is this. where is the question

//(b) both involve the use of levers;