Mountain goats, (Oreamnos americanus) can climb steep inclines; their hooves are designed to provide good traction against rock. They are generally shy animals, but,, with good binoculars, you can see them on very steep cliffs in the Rocky Mountains in North America. To escape a predator, the mountain goat accelerates (with constant acceleration) from rest to a velocity of 3m/s directly up the incline over a duration of 0.1 second. (a) If a mountain goat with mgoat = 90kg is standing still on a mountain slope that makes an angle of 0 = 60 from the horizontal, what is the minimum coefficient of static friction required between its hooves and the rock? (b) Which force is responsible for accelerating the goat up the incline: static friction or kinetic friction? Explain your answer. (c) What is the coefficient of friction needed to keep the goat from slipping?