How can you tell if your turbo went bad?

What is your question?

My 2009 Volvo c70 is making a weird noise when it sits at idle and when I Rev the engine up to about 2,500 rpms. I also noticed that the car hesitates when I try to speed up when it's in automatic mode and when I am using the tipstronic shifter, I've noticed that I have to go to an higher rpm to get to a high speed. It has around 68,800 miles on it