1 find the vector which starts at (3,4) and ends at (5,1). also find its length 2 find the vector which starts at (4,-2,3) and ends at (-3,5,1). also find its length. 3 For u =(2,1) and v = (4,-2), find a) utv b) u-V -20 d) 20+3v e) 0.5v 4 For a = (-2,-5,1) and v = (3,5,-2), find a) utv b) u-v C) -20 d) 20+3v e) 0.5v