2. Suppom f is a function that is continuous everywhere. Given below is the graph of f'. (a) Determine all intervalrr's where the graph of f is both decreasing and concave up. {I point} [11] i. 'What are the values of f '11:] on the interval [1. n1]? {E15 points} ii. Suppose that flit} = 2'. Determine all possible values of IF!) {2.5 points}