"will" for future plans (+ specific time involved - day, date, hour)

Can I use “will” instead of “going to or present continuous” when asking or making statements about someone’s plans with a specific time involved?

for example:

1. I will meet her Monday morning at 7 am.
   (we have an arrangement)

2. What time will you meet her?
   (tell me your plans)

3. She will arrive at 9am. tomorrow.
   (she has an arrangement with my brother)

4. What time will she come home?
   (tell me her plans)