Let f(x) = x³ + 6x² − 15x + 10. (a) Find f'(x) = (b) Find f"(x) = (c) On what interval is f increasing? Increasing interval: (d) On what interval is f decreasing? Decreasing interval: (e) On what interval is f concave downward? Concave down: (f) On what interval is f concave upward? Concave up: (g) State the point of inflection (give as an ordered pair)

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