Please calculate

4. After a company's business expanded dramatically, the top management decided to build a new customer service center. The company's directors listed the factors that influenced the location decision and gave a score to three potential sites, which are shown in the table below. (1) Which is the best location? (5') (2) What is the score value of the fourth factor of A to keep A and B equal? (5') (3) What is the weight importance of the third factor to make Site C the best location? (5') The serial number of Alternative locations Weight Influencing factor A B 1 30 65 80 90 2 15 50 45 75 3 45 95 90 40 4 50 75 90 85 5 25 80 80 55