a$.$ What is the average cost for the tablets $($to $2$ decimals$)?$

$

b$.$ Compare the average cost of tablets with a Windows operating system to th Average cost with a Windows operating system $=$$

Average cost with an Android operating system $=$$

The average cost with a operating system is much high

c$.$ What percentage of tablets use a CPU manufactured by TI OMAP $($to the near $\%$

d$.$ What percentage of tablets use an Android operating system $($to the nearest $\%$