According to the partial construction shown, what is the next step in constructing a line perpendicular to a point off a line?
a. with compass at p, draw an arc above a.
b. with compass at p, draw an arc below a.
c. with compass at p, draw an arc that intersects a in one place.
d. with compass at p, draw an arc that intersects a in two places.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave