4. (2 points) Suppose f is a function, and for all X in the domain of f , we know that tan(f(w)) + f(w) = $2 What is f'(:c)? A. me) = 21' sec(m)mn (:12)+1 2 B. f'(:v) = m 0. ux) = 2\" sec2(f($))+1 D. f'($) = 25c sec(:c)tan(:c) E. f'(2:) = 2:6 8662(f($))