Task: All my work is finished on the Gmail app so sign out on the Gmail app.
Steps:
Go back to the previous page 
Click on the three dots icon at the top right corner of the screen to view the sign out option.
Click on the Manage accounts option to view the sign out option
Click on the my account richardwagner@gmail.com to view the sign out option
Click on the Remove account option to sign out on the Gmail app.
Click on the Remove account button to sign out on the Gmail app.