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

The class is immutable.

delta is a parameter in slowMoveVertical

Circle implements the Canvas

delta is a local variable

The class makes internal method calls

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

The Circle class makes use of external method calls.

The Circle class inherits the class String

The Circle class does not inherit any methods.

The Circle class has overloaded constructors.

The Circle class is a subclass of class Object.