I need help on these 4 calculus questions:

Question 1 (1 point) The following is a graph of the first derivative of the function f(x). On which of the following intervals is f(x) concave down? -1- C B G -3 -2 -1D 1-1 E2 -3- F\fQuestion 2 (1 point) The graphs A (blue), B (red), and C (green) are the graphs of a function f(x) and its derivatives, f'(x) and f"(x). Match the graph to the corresponding function. 140 1.0 B\fTopic 10 - Basic Problems Question 3 (1 point) Suppose f '(x) = 8x3 + 12x + 2 and f(1) = -4. Then f(-1) equals . (Enter a number for your answer) D View hint for Question 3Question 4 (1 point) The substitution u = 3x transforms the integral / edx into O 3u du Of Les du Of - e du ( e"du