A student bikes to school by traveling first dn= 0.900 miles north, then dw = 0.500 miles west, and finally ds = 0.200 miles south.

Take the north direction as the positive y direction and east as positive x. The origin is still where the student starts biking. Let dNdNd_vec_N be the displacement vector corresponding to the first leg of the student's trip. Express dNdNd_vec_N in component form.