HELP PLEASE FOR 55 POINTS!!

In the following diagram line
C
intersects line
D
.



Figure may not be drawn to scale.

Using complete sentences, classify the relationship between
∠
7
and
∠
8
created by the intersection of lines
C
and
D
.
Use complete sentences to explain how the special angles created by the intersection of lines
C
and
D
can be used to solve for
y
.
Solve for
y
and find the measures of
∠
7
and
∠
8
.