Here are your working groups and group numbers

A1 - Harrison, Olivia, Jonathan, and Jill
A2 - Melissa, Billy, Stephen, and Annsley
A3 - Leah, Bobby, and Laura
A4 - Phil, Ricky, Jon, Chris
A5 - Arthur, Cindy, Shaun

C1 - Taylor, Nick, Abe, Kevin
C2 - Sarvie, Aracely, Jeff, Jack
C3 - Caroline, Carolin, Patrick, and Jay
C4 - Tommy, Julia, Max, and Natalie