Params vs Arguments Javascript

function square(num) { // Params
	console.log(num * num);
}

square(5); // Arguments

Q. What will be the output of the following code?

const fn = (a, ...numbers, x, y) => { // SyntaxError: Rest parameter must be the last formal parameter
	console.log(x, y);
};

fn(5, 6, 3, 7);