The operating revenues of the three largest business segments for Charter Communications,

Inc., for $2021$ is listed below. Each segment includes a number of businesses.

Assume that the variable costs as a percent of sales for each segment are as follows:

a$.$ Determine the contribution margin $($round to whole millions$)$ and contribution margin

ratio $($round to whole percentages$)$ for each segment from the information given.

b$.$ Does the segment with the highest contribution margin in $($a$)$ mean that it is the most

profitable segment with the highest operating income?$3.$ The operating revenues of the three largest business segments for Charter Communications, Inc., for $2021$ is listed below. Each segment includes a number of businesses.