Twenty-Five People Responded to a Questionnaire About What Types of Pets

Twenty-five people responded to a questionnaire about what types of pets they had. Construct a frequency distribution for the data $( D =$ dogs only, $\mathrm { C } =$ cats only, $\mathrm { B } =$ both, $\mathrm { N } =$ neither).
$\begin{array} { l l l l l } \mathrm { N } & \mathrm { B } & \mathrm { D } & \mathrm { B } & \mathrm { D } \\ \mathrm { B } & \mathrm { B } & \mathrm { B } & \mathrm { B } & \mathrm { C } \\ \mathrm { C } & \mathrm { B } & \mathrm { D } & \mathrm { B } & \mathrm { C } \\ \mathrm { B } & \mathrm { D } & \mathrm { B } & \mathrm { B } & \mathrm { B } \\ \mathrm { D } & \mathrm { B } & \mathrm { B } & \mathrm { C } & \mathrm { N } \end{array}$