Piped water prices in Singapore rose by 30% in two phases in July 2017 and July 2018 . The average daily usage of water per person has fallen from 148 liters per day before the increase in water prices to 141 liters per day after the increase in water prices. (i) Calculate the price elasticity of demand for water. Explain and interpret the result. Explain the reason (or what is/are the factor(s) that can affect the type of elasticity for water) for the type of price elasticity of demand for water. (6 marks) (ii) Would the total expenditure of consumers increase or decrease as a result of the increase in the price of water? Explain. Illustrate your answer with an aid of an economics diagram