Please help with 1 and 2.

1.

The figure shows f, f', and f". Determine which is which. 2 2 -2Suppose that f (x) is differentiable for x > 0, y = 2x + 1 is the tangent line to the graph of f at x = 1, and f (2) = 6. Which statement must be correct? 0 f is not concave up on (1, 2). O The concavity of f on (1, 2) cannot be determined from the given information. O f is concave up on (1, 2). O f is concave down on (1, 2). o f is not concave down on (1, 2)