Write a function that, given a vector of values from an unknown function, estimates the derivative at a given point by interpolating a quadratic polynomial through the closest 3 available points and differentiating the polynomial analytically.

Which statement is true of web-based social media? a.they allow consumers to interact with and update content. b.they cannot be updated easily, as compared to print media. c.they are expensive to produce and maintain, as compared to print and television. d.they can exist independent of the internet.