Direction: Study the given information carefully and answer the following questions.

Seven trees M, N, O, P, Q, R and S were planted in a garden. Tree O is 8m north of tree S. Tree S is 7m west of tree M. Tree M is 13m east of tree R. Tree R is 15m south of tree N. Tree N is 5m east of tree P. Tree P is 7m east of tree Q.