please include the steps of solving a problem in the answer

Question: A manufacturing firm is planning to purchase a sub-assembly from one of the available suppliers in the market. In the buying center, four decision-makers from four different departments are involved: (i) finance, (ii) quality control, (iii) engineering design, and (iv) operations management. Due to the criticality of the subassembly, the opinions of decision-makers from "quality control" and "engineering design" are weighted double. There are 3 candidate suppliers in the market and the list of decision-making criteria is shown in the below figure. The importance of each criterion set for the decision-makers are as follows: - For the decision-maker of the "finance": the importance of "economic" criteria is three-time and the importance of "ethical" criteria is two-time higher than others. - For the decision-maker of the "quality control": the importance of "economic" and "environmental" criteria is two-time higher than others. - For the decision-maker of the "engineering design"; the importance of "economic", "environmental", and "social" criteria is two-time higher than others. - For the decision-maker of the "operations management": the importance of all criteria is equal. The performance of each supplier with respect to the criterion list is shown in the below table (green cells are maximization \& orange cells are minimization criteria). Use the heuristic approach of AHP to prioritize suppliers for this purchase