The class GeometricObject can only accept types that extend Number.

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$2$ You can create a CirclesString$>$ object with the current code.

$3$ The type of parameter in GeometricObject allows you to use unrelated classes like String if no bounds are provided.

$4$ Circle's getArea$()$ method will return a Double regardless of the generic type provided.

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$5$ All methods in a generic class must return the generic type declared for that class.

$6$ You can have multiple bounds on a generic type, like $<mtext></mtext><mi>T</mi>$ extends Number & Comparableq,$q,q,1Cq,$