Refer to the following graph to answer the question: 
Over the price range $90 to $110,marginal revenue is ________ and demand is ________.
Definitions:
Visual Cliff
A psychological experiment setup to test infants' and young animals' perception of depth and their fear of falling.
Ambiguous
Something that can be understood in more than one way or is unclear because it has multiple interpretations.
Action Tendencies
The predispositions to behave in certain ways in response to specific emotions or environmental stimuli.
Cognitive Processes
Mental activities involved in acquiring, processing, and storing knowledge, such as perception, memory, and reasoning.
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