Measures of Central Tendency: Calculating Range

Below are the age (in months) of dogs in a park during the week. $$\begin{array}{ccccc} 9 & 12 & 14 & 15 & 16 \\ 9 & 13 & 16 & 17 & 18 \\ 8 & 11 & 14 & 17 & 19 \\ 9 & 10 & 14 & 17 & 18 \\ 9 & 10 & 12 & 15 & 16 \end{array}$$

What is the range of the dogs' ages?