simple IoC challenge

simpleioc.php

<?php

class B
{
}

class A
{
    private $b;

    function __construct(B $b)
    {
        $this->b = $b;
    }
}

class Container
{
    public static function make($className)
    {
        // TODO: enhance the make function code
        return new $className();
    }
}

$b = Container::make(B::class); // no problem
$a = Container::make(A::class); // Too few arguments exception