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5. An energy audit of a 4500 m air-conditioned office building has yielded the following data regarding the building and its energy consumption. (i) It consumes 800,000 kWh natural gas (70% is used for heating) and 600,000 kWh electricity (15% is used for AC cooling) per year. (ii) It experiences 2200 heating degree days and 180 cooling degree days per year (Standard annual heating degree days in the region: 2462; Standard annual cooling degree days: 200). (iii) The building operates 5 days a week and 8 hours per day so 2040 hours in total per year (Standard annual hours of usage for air-conditioned office building: 2600). (iv) The building is located at a coastal site (Exposure coefficient: 0.9). Based on the above information and data, (a). is this building located at low or high latitude if it is in the Northern Hemisphere? Explain your reasoning. [4 marks] (b). calculate the building's Normalized Performance Index (NPI). [10 marks] (c). if the building is to be renovated to reduce its energy consumption, what are the most effective passive design measures? Explain your reasoning. [6 marks]