Find the following for the vectors v 10i 2k and u i j k a v u v u b the cosine of the angle between v and u c the scalar component of u in the direction of v d the vector proj u a v u 8 Type an exact answer using radicals as needed v 2 26 Type an exact answer using radicals as needed u 3 Type an exact answer using radicals as needed 4 78 Type an exact answer using radicals as needed c The scalar component of u in the direction of v is Type an exact answer using radicals as needed b The cosine of the angle between v and u is