ประโยคต่อไปนี้เป็นประโยคคำถามหรือไม่คะ ต้องใช้เครื่องหมาย ? เวลาเขียนหรือไม่

I would like to know when I can expect to receive the payment
May I follow with you where he wants to stay during this his visit
Could you please send me the file before end of the day because I have to review the file first
Could you please let me know her decision within this week because we have to prepare the next meeting asap

ขอบคุณคะ