1. Let . (а) [10 pоints] Find the third-оrder Tаylоr polynomiаl for about and use it to approximate . Hint: You don't need to simplify your final answer. (b) [8 points] Assume that is used in order to approximate on . Then, find an upper bound for the remainder or error involved in part (a). (c) [7 points] Use the Taylor polynomial in part (a) to approximate