3. Determine ifthe vectors 3: = [4.1. 3]. 3 12.5.11 and E = [123:5] are coplanar.[5] 4. Given a\": {2,5,3} and t: = [itmt 3. Calculate the angle between H and 3 [3] b. If? ._ [1,3. I]. find t so that; and E are perpendicular. [3]