Which IPO from the list below was the most lucrative (highest fees) for the underwriting investment banks? [Ignore any Greenshoe (over- allotment) provisions.]

-On November 9, 2011, Groupon had their initial public offering

(IPO). They sold 35,000,000 shares at $20/share. The underwriting discount was $1.20/share.

-On November 22, 2011, Angie's List had their initial public offering (IPO). They sold 8,793,408 shares at $13/share. The underwriting discount

was $0.91/share.

-On December 21, 2011, Zynga had their initial public offering

(IPO). They sold 100,000,000 shares at $10/share. The underwriting discount was $0.325/share.