For the parametrization 
, find the unit normal vector at 
.
Definitions:
Natural Monopolies
A market condition where due to high infrastructure costs or significant barriers to entry, a single company can supply a product or service more efficiently than multiple competing firms.
Government Regulation
The establishment of rules and laws by government bodies that are intended to control or govern conduct and practices within various sectors.
Price Discrimination
A pricing approach in which the same provider sells the same or nearly the same products or services for different prices in distinct markets or to various customers.
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