Be aware that for some people, phone calls are very difficult, or emails may disappear to the bottom of a full inbox never to be seen again
How do you prefer tasks to be allocated?
Don't assume everybody will be able to use your method. They may need more context in writing. They may prefer to collect tasks throughout the week and then meet with you to discuss. Etc.
If I notice that something is not getting done which I think should be, how would you like me to bring it to your attention?
How do you prefer feedback? Balance of positive and negative strokes etc.
Is there anything that really matters to you that I should be aware of?
e.g. 'planning and details put me under pressure, I prefer to be flexible' or conversely 'I find uncertainty difficult and don't like it when plans change' etc.
Can we agree how you will let me know if you are struggling before things go wrong?
My addition
Do you feel excluded in any way? How can we include you?
How to get answers?
Send by email, don't ask directly, to give space
Send my own answers to the questions along with the questions, to lead with vulnerability
"You can reply by email, send it by Slack, discuss face-to-face in our 1 to 1s, whatever feels most comfortable"