Theater class

On page 134 of the book, Wilson states "The final and most significant crisis is referred to as the climax."  The climax can resolve the issues of the play either happily, unhappily or without clear resolution.  Based on Wilson's definition where does the final  climax of "Dinner With Friends" occur? Why do you believe this to be so and does the play resolve happily, unhappily or with no resolution at all?  Be sure to use clear examples from the play script to support your statements.