###Challenge 1 I created three divs and assigned each a separate class in order to apply styles to each box individually. I wrapped divs 2 and 3 in a parent div in order to group them together. I left the positioning of div 1 alone and floated the parent div containing divs 2 and 3 to the right.
###Challenge 2 I created three divs and assigned each a separate class in order to apply styles to each box individually. I then wrapped all three divs in a parent div. I assigned the parent div a width of 100%. I centered div 2 using margin: 0 auto and I floated div 3 to the right. I left the default display of block in order to keep each div on separate lines.