Will give brain! answer these questions

Part A I think that first and last picture are appropriate for drawing, especially the first one.
part B) I don't know

second picture)

everyone receives 8 tickets

third picture)....................

fourth picture) the answer is

fifth picture)

the first model has 8 parts.Each part shows

of the whole.
there are 4 shaded parts.

the second model has 8 parts.Each part shows

of the whole.
there are 4 shaded parts.

because the wholes are equal Omar is right

The correct answer is $90