Answer the following questions about the Circle class in the figures$2$ project from the previous question:

$($a$)$ Select all of the following options that are true

Circle implements the Canvas

delta is a local variable

The class makes internal method calls

delta is a parameter in slowMoveVertical

The class is immutable.

$($b$)$ Select all of the following options that are true

The Circle class has overloaded constructors.

The Circle class inherits the class String

The Circle class is a subclass of class Object.

The Circle class does not inherit any methods.

The Circle class makes use of external method calls.