To see demos on how to it, click on the links below:

Copy paste the bar graph with 2 series and modify it (i.e. plot the 3 series)
http://www.youtube.com/watch?v=rLThogrqe8E Movie MP4 (HD)
Color code the inside of the bars
http://www.youtube.com/watch?v=L7lIthmVVbs
Movie MP4(HD)
Color code the borders of the bars
http://www.youtube.com/watch?v=BA686W9D39o
Movie MP4(HD)
Plot the Confidence intervals
http://www.youtube.com/watch?v=w1GMRGDQCvo Movie MP4 HD)
Write the labels inside the bars
http://www.youtube.com/watch?v=R_2aMzIUbwA
Movie MP4(HD)