At 9 p. m. an oil tanker traveling west in the ocean at 11 kilometers per hour passes the same spot as a luxury liner that arrived at the same spot at 8 p. m. while traveling north at 13 kilometers per hour. if the "spot" is represented by the origin, find the location of the oil tanker and the location of the luxury liner t hours after 8 p. m. then find the distance d between the oil tanker and the luxury liner at that time.