3. Given that Vector [i = 3 i + mj and Factor E = 4i + If .Find the value of m if a] Vector {1' and Vector E are perpendicular l1} Vector {1' and Vector E are parallel c] Angle between Vector-51' and Vector 3 when placed tail to tail is El] degrees 9. Determine if the triangle P with the given coordinates is a rightangled triangle using cartesian coordinates P [-5.3] {1 {-13} and H {3,12} 1E}. Given that A [3,1] and Benet} determine the angle between vector AB and the positive v axis