Sympathetic pathways originate in which region of the spinal cord?

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

You see a white marker with an orange circle and black lettering. what does this marker tell you