Suppose R and S Are Relations on {A, B, C $$R = \{ ( a , b ) , ( a , d ) , ( b , c ) , ( c , c ) , ( d , a ) \} \quad \text { and } \quad S = \{ ( a , c ) , ( b , d ) , ( d , a ) \}$$

question 19

Short Answer

suppose R and S are relations on {a, b, c, d}, where $$R = \{ ( a , b ) , ( a , d ) , ( b , c ) , ( c , c ) , ( d , a ) \} \quad \text { and } \quad S = \{ ( a , c ) , ( b , d ) , ( d , a ) \}$$
Find the combination of relations.
- $$S \circ R$$

---

Definitions:

B Lymphocytes

A type of white blood cell of the lymphocyte subtype, which plays a significant role in the body's immune defense against bacteria, viruses, and other pathogens.

Natural Killer Cell

A type of white blood cell that plays a critical role in the body's immune response by targeting and destroying infected cells and cancer cells.

Cardiomyocyte

A type of muscle cell found in the heart that is responsible for cardiac contraction.

Problem-Focused Coping

The coping strategy of squarely facing one’s troubles and trying to solve them.