Following is a list of the performance of the different genotypes at the S locus in two environments for three populations of lizards.The first number is their running speed (in m/s) , and the second is their relative strength. 
In which population(s) is there evidence for a trade-off between running speed and relative strength?
Definitions:
Principal-agent Problem
A dilemma in which one party (the agent) is expected to act in the best interest of another party (the principal) but may have the incentive to act in their own interest instead.
Shirking
The behavior of avoiding or evading work responsibilities, often in employment settings.
Industrial Unions
Labor unions that represent all types of workers within an entire industry, focusing on broad industry-level labor issues and negotiations.
Craft Unions
are labor unions that represent workers specialized in particular trades or crafts, focusing on securing favorable employment conditions and maintaining standards within their fields.
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