Fixed Size Queue Implementation

meta Implement a fixed-size queue. The queue should support the following operations: enqueue, dequeue, peek (retrieve the front element), and check if the queue is empty. Ensure that the implemented queue disallows enqueue operations when full and returns null or a specific error indicator when attempting to perform operations on the front element if the queue is empty. Provide test cases: Initialize a queue with a fixed size of 3. Enqueue elements [1, 2, 3], then attempt to enqueue 4, which should fail. Peek the front element, expecting 1. Dequeue an element, then enqueue 4. Check the queue state. Scale of operations: up to 100 operations in total. Example Input 3 enqueue 1 enqueue 2 enqueue 3 enqueue 4 peek dequeue enqueue 4 peek