Below is the function f(x). 6- 4- 3 -7-6-5-4-3-2-1 2 1 5 -4 -S. -6. 2 4 5 Over which interval of values is f'> 0? ○ (0,∞) ○ [0,∞) ○ (-0,0) 01-00,00 0 (-00,00] Over which interval of values is f'< 0? ○ (0,∞) ○ [0,∞) ○ (-∞,0) 0(-0∞, 이 0 (-00,00] Over the interval (-∞, ∞), this function is concave up (f">0) concave down (f" < 0)