Which of the following is the graph of the given parametric surface? 
Definitions:
Strategic Group
A concept in strategic management that groups companies within an industry that have similar business models or strategies, allowing for analysis of competition and strategic positioning.
Niche Market
A small, specialized segment of the market with specific needs that are not being addressed by mainstream providers.
Market Share
The portion of a market controlled by a particular company, product, or brand, often expressed as a percentage of total sales in that market.
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