Floated div 1 to the left. Put divs 2 and 3 into a container and set their display as inline block, so that they can be contained in the same line/block. Floated the container with divs 2 and 3 to the right. Challenge 1
Challenge 2 Since none of these boxes need to move out of their natural blocks in the page flow, aligning them can be accompilshed simply using margins to push div 1 all the way to the left, div 2 directly centered, and to push div 3 all the way to the right.