How do I limit my camera distance to my character smooth way in top-down shooter game?

I am making a top-down shooter game. And I want to camera between player and mouse position also limit the distance.I prepare simple sheet. But with my sheet when camera reach limit camera stuck and turn instantly the other position. I dont know to how to do it smoothly. I am a beginner.

this is me sheet:

I want like this:

ps: I am not naitive spaeker. Sorry for my writing mistakes.

Here you go:

dropbox.com/s/a9be4dkk3njb6z6/CameraTD.capx

Here you go:

https://www.dropbox.com/s/a9be4dkk3njb6z6/CameraTD.capx?dl=0

Thank you. Works perfectly.