You can try the Random Mouse and the Wall Following algorithm on this one - which is most efficient?
This one (above) is more tricky - how may routes are there? one or more?
Again try an algorithm on it. Maybe try the dead end filling algorithm?
You can right click and save image as - or use the snip tool to snit into Word. - You can print it from there to try out your ideas - Put your name on the work!