Help with these questions and steps if you don't mind would be very thankful.

9. If AB is (5,10, -3) and A is (1, -4,2), find B. [5 points] 10. Given u = (2,1,3) and v = (-1, -4,6), find the angle between u and v. Round your answer to the nearest degree. [5 points] BONUS: [For +2%] Graph the set of points that satisfy 0