Final answer:
The chapter designation for Ed Lu, a Pi Kappa Phi at Cornell, would depend on the unique designation given to the Pi Kappa Phi chapter at Cornell University.
Step-by-step explanation:
The chapter designation for Ed Lu, who was a Pi Kappa Phi at Cornell, would be specific to the fraternity's system of chapters and would depend on the name or number of the chapter at Cornell University. Each chapter of Pi Kappa Phi is assigned a unique designation, such as a Greek letter, number, or name that distinguishes it from other chapters across the country.