1) (30 Point): In order to select the best mobile phone, pairwise comparison matrix for four evaluation criteria is given in the following table. Accordingly, a) Calculate Consistency Ratio (CR) for the table. b) Calculate weights of criteria using Analytical Hierarchy Process (AHP) technique. c) Apply TOPSIS method to rank alternatives

1) (30 Point): In order to select the best mobile phone, pairwise comparison matrix for four evaluation criteria is given in the following table. Accordingly, a) Calculate Consistency Ratio (CR) for the table. b) Calculate weights of criteria using Analytical Hierarchy Process (AHP) technique. c) Apply TOPSIS method to rank alternatives Price or Looks Table 1. Pairwise comparison between alternatives Storage Camera cost space Price or cost 1 5 4 Storage space 0.2 1 0.5 Camera 0.25 2 1 Looks 0.14 0.33 0.33 7 3 3 1 Table 2. Evaluation matrix for alternatives according to criteria Storage Camera Looks space cost Price or HUAVEI 7 9 9 8000 SAMSUNG 8 7 8 7000 IPHONE 9 6 8 9000 OPPO RENO 6 7 8 6000