Tablet PC Comparison provides a wide variety of information about tablet computers. Their website enables consumers to easily compare different tablets using factors such as cost$,$ type of operating system, display size, battery life, and CPU manufacturer. A sample of $7$ tablet computers is shown in the table below $($Tablet PC Comparison website$).$ Which variables are categorical? $($Select all that apply.$)$

cost

operating system

display size

battery life

cpu manuafacturer

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Which variables are quantitative? $($Select all that apply.$)$

cost

operating system

display size

battery life

cpu manuafacturer