A pair of ice skaters are practicing a figure skating move on the ice. The two skaters are separated by a distance of 15 m. If the first skater skates at a constant velocity of 5.0 m/s along a line initially making a 40 degree angle with respect ot the line connecting the two skaters, with what velocity will the second skater need to skate at so that she meets the first skater at a right angle?