Input and Animation Blendspace 3rd Person Character - Sneak to Walk to Run?

I’m trying to set up where I can have my 3rd person character sneak when holding the alt key and using the WASD keys (sneaking will basically be crouching). Then you can walk if you are not holding the alt key or pushing the controller left stick all the way forward. Also, want to be able to run when holding the shift key or left stick button down (toggle). I have a 1D blend space with Idle, Sneaking FW, Walking FW, and Then Running FW. How can I achieve this?