5. Given the following function, nd the intervals on which the function is increasing, the intervals on which it is decreasing, and nd all relative max and min points [may]. f(x) = x3 + 3x2 15. Givan the following function, nd the intervals on which the function is increasing, the intervals on which it is decreasing, and nd all relative max and min points (I, y] . f{x} = 4x3 x4 7. Given the following tncticn, nd the intervals on which the function is increasing, the intervals on which it is decreasing, and nd all relative max and min points (may). fljx] = l-2cos[x} on [0,2213]