Don't say these things.
And before someone says these are ridiculous, I've heard every one of them.
I was a pastor of local churches for about 30 years and I have witnessed the deaths of many people... been with them and their families and friends. My wife is a palliative care nurse. Believe me, we've heard even worse.
But, there are good things that can be said during times of grief. Things like:
"I'm sorry for your loss."
"Here's my number if you need someone for anything at all."
"I wish I had the right words. Just know I care."
Or... you can say nothing at all. Perhaps give a hug if they give you permission.
It's comfort we need at times like these, not stupid explanations.