There are $10,000$ potential customers for the product sold by companies $1$ through $10.$ Table $1$ provides information about the number of potential customers exposed to an advertising message presented in each of five specific venues. For each venue, the overall number of people exposed to the message is shown. Additionally, the audience is broken down by age, gender, and income. Remember, there are $10,000$ people overall; each of these people falls into exactly one age, gender, and income category. That is$,$ of those $10,000$ people, $5,000$ are $<30$ years old and $5,000$ are $>30$ years old, $5,000$ are women and $5,000$ are men, and $5,000$ make $<50$K and $5,000$ make more than $50$K$.$ The number of impressions in each venue overall and by groups is in Table $1.($a$)$ Overall cost per point $($cost of the ad$/$GRP overall$)$

$($b$)$ Cost per point by age group $($cost of the ad$/$GRP for each age group$)$

$($c$)$ Cost per point by gender $($cost of the ad$/$GRP for each gender$)$

$($d$)$ Cost per point by Income $($cost of the ad$/$GRP for each Income Group$)$

Please use the information in the Excel spreadsheet linked above to answer the questions.