efer to the image here which shows a hill, an intermittent stream (in blue), contour lines (light brown) and two index contours (darkened brown contour lines). Assume the contour interval for this map is 5 ft, and the index contour that is crossing the stream has an elevation of 70 ft. Assume that North is at the top of the image. image.png Is the stream flowing to the North or South and how do you know