1. Ifii = [2, 4,-1] and 13 = [1,-2.4] find: a) 3133 b) lii+22k| c) Find 6, where F(2, 3, 4) and F6 = 313' 2. If&' 2 [m, n, 1] is perpendicularto both ('1' = [5,1,2] and 5 = [3, 3, 6], find m and n. 3. If Il = 6, Il = 12 and the angle between these vectors is 83, determine a) E X 13 4. The diagram is a rectangular prism. Let ii = A3, 13 = A and W = A_E'. Express each vector as a linear combination of ii. 13 and W. a) EF = b) HR =