Graph the following function and describe all extrema. Round answers to the nearest hundredth. 
Definitions:
Maintenance
The process of preserving or keeping equipment, machinery, buildings, etc., in working order by conducting regular check-ups and repairs.
Income Effect
How an alteration in income for either a person or an economic system influences the demand levels for a certain good or service.
Price Ceiling
A legally imposed maximum price on goods or services, beyond which they cannot be sold.
Quantity Demanded
The total amount of a good or service that consumers are willing and able to purchase at a given price.
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