How to help your friend when their dad passes away?

My best friend’s dad has been very sick for a longgg time now. She’s a registered nurse and took care of him and did everything for him- dialysis, bloodwork, dr appts, etc.. So much of her life has been consumed with taking care of him. He passed away tonight while she was visiting him, and she did CPR for 30 minutes before giving up. My heart is broken for her. I don’t know what to say or do. I want to help her so bad but I don’t know how to even start. I can’t imagine how traumatic that must of been for her. She’s been “expecting” it for a while, but I know nobody is actually prepared for that to happen, much less in that manner.. any advice would be appreciated . Much love to you all.