9. Let f : [3, 4] + R be the function defined by if if 1 (x if 2 < x < 4 (a) Sketch the graph of f within its domain. (b) Does f attain any local maximum and local minimum? If yes, at which x- val ues? (c) Does f attain any absolute maximum and absolute minimum? If yes, at which x-values? Find the corresponding values as well.