Problem: Determining Speed Characteristics from a Set of Speed Data $[10$ points$]$

The table below shows the speed data collected on an urban highway during a traffic speed study. Develop the frequency histogram and the frequency distribution of the data and determine:

The arithmetic mean speed

The standard deviation

The median speed

The pace $($range within which most vehicles are traveling$)$

The mode or modal speed

The $85$ th$-$percentile speed

$\backslash$table$[[\backslash$table$[[$Car$],[$No$.]],\backslash$table$[[$Speed$],[(k\frac{m}{h})$