A) B) C) D)

$\begin{array}{c|c}\text { Speed } & \begin{array}{c}\text { Number } \\\text { of cars }\end{array} \\\hline 0-29 & 4 \\30-59 & 16 \\60-89 & 60 \\90-119 & 20\end{array}$

A)
$\begin{array}{r|c}\text { Speed } & \begin{array}{c}\text { Cumulative } \\\text { Frequency }\end{array} \\\hline \text { Less than } 30 & 100 \\\text { Less than } 60 & 80 \\\text { Less than } 90 & 82 \\\text { Less than } 120 & 4\end{array}$

B)
$\begin{array}{r|c} & \begin{array}{r}\text { Cumulative } \\\text { Speed }\end{array} \\\hline \text { Less than } 30 & 0.04 \\\text { Less than } 60 & 0.20 \\\text { Less than } 90 & 0.80 \\\text { Less than } 120 & 1.00\end{array}$

C)
$\begin{array}{c|c} & \text { Cumulative } \\\text { Speed } & \text { Frequency } \\\hline 0-29 & 4 \\30-59 & 20 \\60-89 & 80 \\90-119 & 100\end{array}$

D)
$\begin{array}{r|c}\text { Speed } & \begin{array}{c}\text { Cumulative } \\\text { Frequency }\end{array} \\\hline \text { Less than } 30 & 4 \\\text { Less than } 60 & 20 \\\text { Less than } 90 & 80 \\\text { Less than } 120 & 100\end{array}$