Why did the person who was previously in my role leave? What's the average time someone is employed here? How many employees have kids? How old are the other em

Why did the person who was previously in my role leave? What's the average time someone is employed here? How many employees have kids? How old are the other employees? What's the usual vacation time someone actually takes here? I probably wouldn't ask all of these, but a cross-section of them usually gives me an indication of how much churn they're having, the type of employees they have, and what the work style is