$16$

$3$ points

Two vertical lines represent the $q,$ cardinality symbol. $$

$1$ optional many

mandatory many

$2$

optional single

mandatory single

$4$

$5$

$6$

$7$

$8$

$9$

$10$

$17$

$3$ points

A relationship exists when two entities are associated.

solitary

ternary

unary

binary