Indicate Which of the Following Users Are Classified as Internal

Indicate which of the following users are classified as internal versus external users.
$$\begin{array} { | l| l | l | l | } \hline & \text { Internal } & \text { External } \\\hline \text { 1. } \quad \text { Purchasing manager } & & \\\hline \text { 2. } \quad \text { Potential investor } & & \\\hline \text { 3. } \quad \text { Internal Revenue Service } & & \\\hline \text { 4. } \quad \text { Inventory control manager } & & \\\hline \text { 5. } \quad \text { Supplier } & & \\\hline \text { 6. } \quad \text { Quality control manager } & & \\\hline \text { 7. } \quad \text { Chief financial officer } && \\\hline \text { 8. } \quad \text { Banker } & & \\\hline \text { 9. } \quad \text { Warehouse manager } & & \\\hline \text { 10.} \quad \text {Payroll supervisor } & & \\\hline\end{array}$$