Afunction y(t) satisfies the differential equation dy dt = y4 − 12y3 + 32y2. (a) what are the constant solutions of the equation? (enter your answers as a comma-separated list.) y = 0,4,8 (b) for what values of y is y increasing? (enter your answer in interval notation.) y (c) for what values of y is y decreasing? (enter your answer in interval notation.) y