The stage directions impact the way actors perform this scene by indicating the feelings they should convey through their words, gestures, and movements.
Stage directions are instructions that appear in parentheses when we read the script of a play or of a movie, for example. Their purpose is to guide those involved in production, but especially the actors.
In the passage we are analyzing here, the stage directions are "suddenly," "frustrated," and "with a sigh of relief." They indicate the feelings the actors must convey, which impacts the way the actors talk and move around in the scene.
If the stage directions were not there, the actor playing Liz, for example, could very well say the first line in a flat, unemotional tone. With the direction "suddenly," she will convey a sense of urgency instead.
Learn more about stage directions here:
https://brainly.com/question/3986419