27. Correct. The answer is true. To find the optimal point set the first derivative of f'(x) = 0, or f'(x) = -4x + 4 = 0. From this x0 = 1. To determine whether the optimal point is a relative/global maximum of minimum or neither, check the sign of the second derivative evaluated at the optimal point: f"(x) = -4 for all values of x, therefore, x0 is a global maximum.