Menu Not Showing Over Slider

Hey all,

Maybe someone can help me out? I am working on a project and I’ve gotten the home page to look like how I want it to, except for the menu. The menu is suppose to be on top of all of the content when you are scrolling down the page, but it ends up going behind the slider and reappearing after you passed the slider.

Also whenever you hover above a menu item that has several sub items underneath it, those are also hiding behind the slider, making it impossible for a user to select them.

The link for the site that I am working on is: https://bitlamp.wctc.edu/~ktepp/CAARE2/

Does anyone have any ideas on how to fix this issue