Adding some css to inner most <ul>

Adding some css to inner most <ul>

Hello,

I have a JSFiddle over at:
https://jsfiddle.net/hgbh43jf/

I am also including a screen shot of what I need this page to look like.



What I need is some jQuery code that can traverse this tree and find the most deeply nested  <ul> and add the classes as shown above and set the background to yellow for the  <li>'s

Thanks,

Jim