A Freelance Computer Consultant Keeps a Database of Her Clients $S = \{ \text { Acme, Brothers, Crafts, Dion, Effigy, Floyd, Global, Hilbert } \}$

Essay

A freelance computer consultant keeps a database of her clients, which contains the names
? $S = \{ \text { Acme, Brothers, Crafts, Dion, Effigy, Floyd, Global, Hilbert } \}$ .
?
The following clients owe her money:
? $N = \{ \text { Hilbert, Crafts, Effigy, Global } \}$ .
?
The following clients have done at least $10,000 worth of business with her:
? $B = \{ \text { Hilbert, Brothers, Crafts, Dion } \}$ ?
Write the clients who owe her money and have done at least $10,000 worth of business with her.
?
The answer is __________.