Change the Font Size of an Element HELP needin Halp

Tell us what’s happening:

Your code so far

<style>
  .red-text {
    color: red;
  }
</style>

<h2 class="red-text">CatPhotoApp</h2>

<p class="red-text">Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Linux; Android 7.0; SM-G955F Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.98 Mobile Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/change-the-font-size-of-an-element

I need help on almost everything PLSSSS help