Plz check my error on this JAVA program. I am a beginner

Question

Error : Circle is not abstract and does not override abstract method area() in Shape

Code : https://code.sololearn.com/cWLda2PIcxYX/?ref=app

Answer 1

* The area() method does not take a parameter (check the abstract definition)
* the derived classes need a constructor. This constructor sets the width

Answer 2

Looks okay 👍
(I tested it with the example input from the task description)

Answer 3

Plz check now