Siketch the graph of a function f that has al of the propertes isted. Your graph need not be given by an algebrac formula. (a) Continuous for all read numbors (b) Decreasing on (,4) and (1,3). (d) Concawo upward on (,21) and (21,) (c) Increasing on (4,1) and (3,) (e) Concave downward on (21,21) (f) y-intercept at (0,3) Choose the correct graph below A. a. c. o