Checking elements in JavaScript

Задание 1

Given an element:

html<div id="elem" class="www"></div>

Check if this element is an element with www class.

Задание 2

Given an element. Check if this element is a paragraph.

Задание 3

Given two variables elem1 and elem2 containing two elements:

html<div id="elem1">
  <p id="elem2"></p>
</div>

javascriptlet elem1 = document.querySelector('#elem1');
let elem2 = document.querySelector('#elem2');

Check if an element from elem2 is a child of an element from elem1.