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css float and validation start
<section> <h2>col1</h2></section> <section> <h2>col2</h2></section> <footer> <!--add validation for html5 and css3; find the code in ex 1, 2, 3 r 4 instructions; add target="_blank" in the link <a> tag so that the browers opens a new page with the validation results--> </footer>