Change the width of iframe to 600px and height is 400px
Change the color of Heading 3 is red
Change image width to 60%
Change strong text to blue
>Change the padding Heading 1 to 10px,background color green and color white.

This is the main heading that is wrapped in "h1" tags

Lorem ipsum dolor sir amet, consecterur adipicing elit. Nam malesuada vehicula dictum. Integer tristique saplen nee lectus lobortis placerat. MAKE THIS TEXT BOLD. Vestibulum molestie
semper facilisis. Vestibulum finibus sit amet metus eget elementum. Morbi sed eros orci. MAKE THIS TEXT ITALIC.Nullam lacinia interdurn felis sit amet aliquet