Find the equation of the normal line to the given surface at the specified point. 
Definitions:
Prospect's Business
The specific commercial or industrial enterprise that a potential client operates or is involved with.
Benefit Summary
An overview detailing the advantages or positive outcomes of using a product or service.
Listening Skills
The ability to accurately receive and interpret messages in the communication process, crucial for understanding customer needs and building relationships.
Need-Satisfaction Presentation
A sales approach where the presentation is tailored to match the specific needs and desires of the customer, emphasizing how the product or service meets those requirements.
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