Answer: I think it would be punctuated like this: "At the age of twenty, she became a neurosurgeon." I'm assuming "si" is a typo lol
have a great day!
Answer:
At the age of twenty six, she became a neurosurgeon.
Explanation:
A comma is always added when the reader should take a pause. Correct spelling should also be included so the text is legible. Periods are used at the end of sentences.