How to compare INTERVAL YEAR TO MONTH data types in Oracle SQL Developer?

so I have table Product_Information

How should I do a diapason check between intervals? This is the code I've tried

case W.WARRANTY_PERIOD 
    when INTERVAL '0-0' YEAR TO MONTH THEN 'No warranty' 
    when INTERVAL '0-3' YEAR TO MONTH THEN '3 months' 
    end as Warranty 

I've already joined the table, but I need result like this:

Use EXTRACT in a CASE expression:

SELECT product_id,
       CASE EXTRACT(YEAR FROM warranty_period)
       WHEN 0 THEN NULL
       WHEN 1 THEN '1 year'
       ELSE EXTRACT(YEAR FROM warranty_period) || ' years'
       END
       || CASE
       WHEN EXTRACT(YEAR FROM warranty_period) > 0
       AND  EXTRACT(MONTH FROM warranty_period) > 0
       THEN ' and '
       WHEN EXTRACT(YEAR FROM warranty_period) = 0
       AND  EXTRACT(MONTH FROM warranty_period) = 0
       THEN 'No warranty'
       END
       || CASE EXTRACT(MONTH FROM warranty_period)
       WHEN 0 THEN NULL
       WHEN 1 THEN '1 month'
       ELSE EXTRACT(MONTH FROM warranty_period) || ' months'
       END AS warranty
FROM   product_information;

Which, for the sample data:

CREATE TABLE product_information (
  Product_ID      NUMBER(6,0),
  Warranty_Period INTERVAL YEAR(2) TO MONTH
);

INSERT INTO product_information (product_id, warranty_period)
SELECT 102, INTERVAL '1-6' YEAR TO MONTH FROM DUAL UNION ALL
SELECT 103, INTERVAL '4' MONTH FROM DUAL UNION ALL
SELECT 104, INTERVAL '0' MONTH FROM DUAL UNION ALL
SELECT 105, INTERVAL '1' MONTH FROM DUAL UNION ALL
SELECT 106, INTERVAL '1' YEAR FROM DUAL;

Outputs:

PRODUCT_ID	WARRANTY
102	1 year and 6 months
103	4 months
104	No warranty
105	1 month
106	1 year

db<>fiddle here