When u, v are the displacement vectors = AB. V = AP. determined by the parallelogram S R Q D P C Bexpress QC in terms of u and v, where P. B. D and R are the midpoints of AQ, AC, CS and SQ, respectively. 1. = 2(u - v) 2. = 2v - 1 19121 3. = 2u 4. QC = u+ 2v 5. QC = 2v 6. QC = 2(utv)