How do I solve this question?

in Sasha is trying to bound the error of her Mm approximation of / siur 11.1: She computes ' [1 Wm) = (l and f\"(7r) = U and so decides to use K : t). a What does her choice of K imply about the accuracy of her caiculation. Expiain what is wrong with Sasha's reasoning. Compute the actual error bound for the J'Um approximation