Hello, please can you help me answer this question on the book Cities in a World Economy by Saskia Sassen?

I have read the whole book but the content is very nuanced and I am not sure if my understanding of the content is correct.

I need to formulate a long and very detailed answer to this question, with page references:

Sassen believes that global cities are both place-bound and placeless - describe what she means by that. Also explains how she views the relationship between global cities and nation states. (one page and a half)

Can you please help me?