Change width of a particular stack in Makie bar plot

[math_opt]

I need to have some customization in my bar plots, and was wondering if someone could help me achieve the following two things:

1. How to specify different widths to different stacks in the bar plot? For example, in the plot below, I want the width as follows left = 0.7, middle = 0.9, right = 1.3, extra = 0.5.
2. How to write some numbers over each stack. For example, how to write say 2.0 over left stack, 3.0 over right stack, and so on?
   
   

Code:

using CairoMakie
tbl = (
    x = [1, 2, 3, 4, 1, 2, 3, 4],
    height = [10,15,20,25,12,17,23,30],
    grp = [1,1,1,1,2,2,2,2],
)
barplot(tbl.x, tbl.height; 
dodge = tbl.grp, 
color = 1:8,
axis = (xticks = (1:4, ["left", "middle", "right", "extra"]),
                title = "Dodged bars"))

Thanks!