Create

(a) a frequency table of the aluminum alloy strength data on page 29 using the classes [66.0, 67.5), $[67.5,69.0),[69.0,70.5),[70.5,72.0),[72.0$, $73.5),[73.5,75.0),[75.0,76.5)$, where the righthand endpoint is excluded

(b) a histogram using the frequency table in part (a)