How can i change the position of a data in a data field in mongoDB?

Question

I am learning a mongoDB right now and to progress on my project I wanted to be able to change the position of a data inside a a data field. For example:

FROM

{"Student_No": "1", "Last_Name": "Jain", "First_Name": "Rohan"} 

TO

{"Student_No": "1", "First_Name": "Rohan", "Last_Name": "Jain"}

---

So basically I just want to change the position of the data as shown above

Thanks for any help in advance