Exercise 4.1 Identify critical numbers and find the absolute maximum value and absolute minimum value for each of the given functions on the given interval. 1 f(x) = x³; [-2, 1] 2 f(x)=x²- 2x² + 3; [−1, 2] 3 5 (5 - 2x); [-1,2] f(x) = f(x)=x²-3x²; [-1, 3] 4 6 f(x)=2cosx+x; [0,2 ] f(x) = 3x³ - 20x³; [-2, 2]​