5) Sally is walking in a straight line through the Circular Forest, which has the shape of a perfect circle. She enters the forest at a point 10 km east and 4 km north of the center of the forest. She exits the forest at Point P and continues walking in the same direction. Point P is due south of a point 3 km due east of the center of the forest. When she is due south of the center of the forest, how far from the center is she?​