The price of coffee rose sharply last month, while the quantity sold remained the same. Each of five people suggests an explanation: TOM: demand increased, but supply was perfectly inelastic; DICK: Demand increased, but it was perfectly inelastic; HARRY: demand increased, but supply decreased at the same time; LARRY: supply decreased, but demand was unit elastic; MARY: supply decreased, but demand was perfectly inelastic. Who would possibly right? Explain

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