The demand function for a certain item is Use interval notation to indicate the range of prices corresponding to elastic, inelastic, and unitary

NOTE: When using interval notation in WeBWorK, remember that:
        You use 'I' for and '-I' for .
        And use 'U' for the union symbol.
a) The range of prices for elastic is

b) The range of prices for inelastic is

a) The prices for unitary is

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