Suppose Spencer and Kate are the only two demanders of lemonade. Each month, Spencer buys six glasses of lemonade when the price is $1.00 per glass, and he buys four glasses when the price is $1.50 per glass. Each month, Kate buys four glasses of lemonade when the price is $1.00 per glass, and she buys two glasses when the price is $1.50 per glass. Which of the following points is on the market demand curve? 
Definitions:
Carpels
The female reproductive organs of a flower, comprising the stigma, style, and ovary, which may occur singly or fused together to form a compound ovary.
Ovary
A female reproductive organ in which ova or eggs are produced, present in humans and other vertebrates as a pair.
Stamen
The stamen is the male reproductive part of a flower composed of the anther and filament, responsible for producing pollen.
Volatile Chemicals
Substances that easily vaporize at normal temperatures and pressures, often having strong odors.
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