How to randomly choose 1 of 3 spaceship for shoot

how to I randomly choose 1 of 3 spaceships for shooting? so far I didnt manage to choose the random spaceship object to shoot everytime in a different x axis

public void ShootProjectile()
{

    firePoint.rotation = Quaternion.Euler(0, 0, 90);

    if (projectilePrefab != null && firePoint != null)
    {

        // Instantiate the projectile at the firePoint's position and rotation
        GameObject projectile = Instantiate(projectilePrefab, transform.position, firePoint.rotation);

        // Optionally, apply velocity to the projectile for movement
        Rigidbody2D rb = projectile.GetComponent<Rigidbody2D>();
        if (rb != null)
        {
            rb.velocity = Vector2.left * 8f;  // Adjust this speed as needed
        }
    }
}

ty

You wanna choose the spaceship on runtime or based on the obstacle?