Task: I want to share the A_short_history_of_Germany pdf file with my wife, clarawagner@gmail.com, via the Gmail app because she asked me to share this pdf with her.
Steps:
Go back to the previous page
Click on the search icon at the top right corner of the screen to search the file
Type A_short_history_of_Germany in the search bar to find the file
Click on the search icon at the bottom right corner of the screen to view the search file
Click on the three dots icon of the A_short_history_of_Germany file to view the share option
Click on the Share option to share this file 
Click on the Gmail icon to share this file through Gmail app
Type clarawagner@gmail.com in the recipient section to share this file with my wife
Click on the send button at the top right corner of the screen to share this file with my wife