What will be the output of the following JavaScript code?

let x = "10";
let y = + x;
    
document.write(typeof y);

What will be the output of the following JavaScript code?

let x = 10; 
document.write(typeof x, " , ", typeof String(x));

What will be the output of the following JavaScript code?

let x = 10;
document.write(x, " , ", toString(x));