facts factors such as cost$,$ type of operating system, display size, battery life, and CPU manufacturer. A sample of $6$ tablet computers is shown in the table below $($Tablet PC Comparison website$).$

$\backslash$table$[[$Tablet$,$Cost $($$$),\backslash$table$[[$Operating$],[$System$]],\backslash$table$[[$Display$],[$Size$],[($inches$)]],\backslash$table$[[$Battery$],[$Life$],[($hours$)]],\backslash$table$[[$CPU$],[$Manufacturer$]]],[$Acer Iconia W$510,599,$Windows,$10\mathrm{.}1,8\mathrm{.}5,$Intel$],[$HP Envy X$2,860,$Windows,$11\mathrm{.}6,8,$Intel$],[$Lenovo ThinkPad Tablet,$668,$Windows,$10\mathrm{.}1,10\mathrm{.}5,$Intel$],[$Microsoft Surface Pro,$899,$Windows,$10\mathrm{.}6,4,$Intel$],[$Motorola Droid XYboard,$530,$Android,$10\mathrm{.}1,9,$TI OMAP$],[$Sony Tablet S$,360,$Android,$9\mathrm{.}4,8,$Nvidia$]]$

a$.$ How many elements are in this data set?

b$.$ How many variables are in this data set?

c$.$ Which variables are categorical and which variables are quantitative?

Variable

Categorical$/$Quantitative

Cost $($ $ $)$

Operating System

Display Size $($inches$)$

Battery Life $($hours$)$

CPU Manufacturer