Answer:
Extrema: relative minimum (1.25,-3.25), relative maximums (3.25,10) and (0,0)
Zeros: (0,0), (2,0), and (4,0)
End behavior: As x approaches infinity, the function approaches negative infinity. As x approaches negative infinity, the function approaches negative infinity.
Intervals of increase and decrease: increasing on (-∞, 0) and (1.25, 3.25), decreasing on (0, 1.25) and (3.25, ∞)
Positive and negative intervals: positive on (2, 4), negative on (-∞, 0), (0, 2), and (4, ∞)
