A cupcake baker is baking and selling cupcakes to make money

His equation which shows profit (y) for selling cupcakes at price (x) in dollars

The equation is y= -200(x-3)² + 450

questions :
1, What profit would the baker make if he sold cupcakes for $5?
2, What price would maximize his profits? ( if negative it is a loss)
3, What would the maximum profit be?
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