Problem while upload existing sketch, please help me

Arduino: 1.8.8 (Windows 7), Board: "Arduino/Genuino Uno"

Sketch uses 3562 bytes (11%) of program storage space. Maximum is 32256 bytes.
Global variables use 33 bytes (1%) of dynamic memory, leaving 2015 bytes for local variables. Maximum is 2048 bytes.
Serial port not selected.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

You need to select the port of your Arduino board from the Tools > Port menu.