Let $L$ Be the Language Defined by the Regular Expression $( x \mid y ) ^ { * } x ( x \mid y )$

question 6

Essay

Let $L$ be the language defined by the regular expression $( x \mid y ) ^ { * } x ( x \mid y )$ .
(a) Write 3 strings that belong to $L$
(b) Use words to describe $L$ .

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Definitions:

Opportunity Cost

Opportunity cost is the cost of foregoing the next best alternative when making a decision, representing the benefits an individual, investor, or business misses out on when choosing one alternative over another.

Truck

A motor vehicle designed to transport cargo or goods.

Comparative Advantage

The ability of an entity to produce a good or service at a lower opportunity cost than its competitors, leading to more efficient trade.

Absolute Advantage

The capability of a country, entity, or individual to produce a good or service more efficiently than competitors, using fewer resources.