Suppose you are given a function at) and you I only are told that f '(a) is undefined. What do you know II only about the function f (3:)? I and III I. The slope of the line tangent to f (x) is positive. None Of the Statements mUSt be true. II. The instantaneous rate of f (:12) at a is negative. 1]]. The function is dened at f (a)