force the width of bar; set different colors in a series

[User (Legacy)]

I have 2 questions:

1) given a bar chart with 1 series how can I force the width (not height) of

the bar to be say 10 pixels or better yet,  say 25% of the possible graph.

An example problem is included in the figure below, here the number of bars

is determined at run-time, if only one or two values exist then the bars are

very fat and look ugly.

2) I have another bar chart that has 1 series, n (multiple) bars and I want

to designate the color of each bar, how to do this. I can instead have n

series, with 1 bar each, but how do I manually put tick and labels on each

one?

Figure: