Describe the major differences among industrial firms, resellers, and government units in 1. Canada. 2. Explain how the North American Industry Classification System (NAICS) might be helpful in understanding industrial, reseller, and government markets, and discuss the limitations inherent in this system. 3. List and discuss the key characteristics of organizational buying that make it difference from consumer buying 4. What is a buying centre? Describe the roles assumed by people in a buying centre and what useful questions should be raised to guide any analysis of the structure and behaviour of a buying centre.