如何使用jquery从ul中删除li项目并在同一页面上添加到另一个项目

I'm trying to remove a li item from one ul to another within the same page using JQuery, I've tried two ways but have been unsuccessful so far. In my last attempt I tried to use the delegate method and wire a click event on the button with class .checked. However, this deletes everything from the current ul I'm trying to remove the item from and doesn't add it to the the second ul with id completed tasks. I'm trying to remove a li item from one ul to a