Final answer:
The feelings that best describe Mrs. Summers's state of mind would be 'frightened and nervous' based on the consistent theme of anxiety and disquiet present in the various excerpts.
Step-by-step explanation:
The set of feelings that best describes Mrs. Summers's state of mind in the cable car at the end of the story is frightened and nervous. Throughout the various excerpts provided, there's a consistent theme of characters dealing with fear, exhaustion, and existential crisis. From the narrator's restlessness and doubts to the profound physical and inner exhaustion described, one can infer a sense of anxiety and disquiet rather than cheerfulness, indifference, or humor.
While not explicitly about Mrs. Summers, the emotions portrayed in these excerpts provide a context of what characters in similar situations might feel—ranging from preoccupied sadness to a sense of being overwhelmed and yearning for calm. The feelings of fear and nervousness as depicted align with experiences of characters who are anxious about an uncertain future or grappling with difficult realities.