Find the critical numbers of the function. (Enter your answers as a comma-separated list.) g(t) = t*sqrt(13-t), t < 12. Find the critical numbers of the function. (Enter your answers as a comma-separated list.) h(x) = sin^2 x + cos x, 0 < x < 2pi. Find the absolute extrema of the function on the closed interval. f(x) = 9 - x, [-1, 5] minimum (x, y) = (-1, 10) maximum (x, y) = (5, 4)