Explanation : According to Zeithaml and colleagues, there are five dimensions of service: 1. Tangibles: Appearance of physical facilities, equipment, personnel and communication materials. 2. Reliability: Ability to perform the promised service dependably and accurately. 3. Responsiveness: Willingness to help customers and provide prompt service. 4. Assurances: Knowledge and courtesy of employees and their ability to convey trust and confidence. 5. Empathy: Caring, individualized attention provided to customers.