Sketch the graph of the ellipse, showing the foci . 
Definitions:
Triangulation
The use of multiple methods or data sources in research to improve the accuracy and validity of results by cross-verifying findings.
Ethnography
A qualitative research method focused on studying cultures, practices, and communities through observation and participation.
Sociometry
A quantitative method for measuring social relationships, used to identify the structure of groups and the position of individuals within them.
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