3.9. A Roper organization survey asked, "How far have environmental protection laws and regula- tions gone?" For the possible responses not far enough, about right, and too far, the percentages of responses were 51 %, 33%, and 16%.

(a) Which response is the mode?

(b) Can you compute a mean or a median for these data? If so, do so; if not, explain why not.