Note: Solve the following problems. Show all solutions. Round off final answers to 3 decimal places. Question # 1. The daily water usage per households in Saudi Arabia is normally distributed with mean of 280 liters and standard deviation of 60 liters. a. What percentage of households use more than 445 liters? b. What percentage of households use at most (no more than) 360? c. What is the percentage that 100 households randomly selected from the population will have mean usage of water between 270 and 297 liters?

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