We wish to sketch the graph of the function f(z) = 16 - 5r + 4 (1 - 2)2 . Find all the critical numbers of f and of f' (that is, all potential extrema and/or inflection points). There are two of them; enter their exact values, together with the value I = 2 at which f is undefined, in the first column of the table below (in ascending order : a