Do Not explain just give answer. Finish quick please.

16. Below is the graph of f(x). For what values of x is f(x) concave down? Tf( x) - 2 a. x 1 b. -1 1 17. What is the derivative of the function f(x) = e - 2-2x? a. f'(x) = 2e2* - 2e-2x c. f'(x) =e" + e-2x b. f' (x) = e2 -2-2x d. f'(x) = 2e2* + 2e-2x 18. Determine the derivative dy of y = 34x . a. dy dx = 4(3+*) In4 c. ay = 4134x) dx b. dy dx = 4(3* ) In 3 d. dy dx = (3+*) In4