Welcome to Tableau.
Unfortunately, what you are asking--to make a graph with multiple bar marks and multiple line marks--is not possible as far as I know. You can get close (3 bars, 1 line, a parameter to swap out which measure you display as bar/line, but really, what is needed is the ability to have more than 1 "collection of marks" marks like the "Measure Values" mark.
You can see some more and voice your support for this improvement for future releases in the idea section of Tableau's community pages.
(copy and paste this link into a browser window to go to the most popular Idea thread.)