Find the following for the vectors v = 4i + j and u = - 9i + 7j. 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 projy u a. vu= (Type an exact answer, using radicals as needed.) |v|= (Type an exact answer, using radicals as needed.) |u|= (Type an exact answer, using radicals as needed.) b. The cosine of the angle between v and u is (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.) d. proj, u = i + j (Type exact answers, using radicals as needed.)