A student is playing with a wooden block on a wooden adjustable inclined plane. He notices that the friction is high enough that at most angles the block will not slip. So he sets a block of frictionless ice against the wooden block. and uses bigger and bigger ice blocks until the force the wooden block to slip. He then repeats this at different angles, plotting the ratio of the required ice block mass to the wooden block mass as a function of cotl]. He finds his plot has slope s and yintercept b. What is the coefficient of static friction between the wooden block and the ramp