Let u?=??2,?1,1?u=??2,?1,1? and v?=?1,3,?3?v=?1,3,?3?. Question 4.1 Q4.1 2 Points Grading comment: u??v?=u?v= -8 Question 4.2 Q4.2 3 Points Grading comment: ?u?+v??=?u+v?=