Who, at the age of 17 years, 166 days, became the youngest driver to compete in Formula One race?

I liked F1 especially before becoming "over-technical" but now I was totally sure about the correct answer thanks to a related earlier question. Maybe repeat questions are frustrating to someone but related questions&explanations are helpful and great way to learn.

Not the first to drive under the Dutch flag. Gijs Van Lennep was back in the 1970's.And Max's father the second

What flag did his father race under,if he is the first to race under the Dutch flag