Extremes

Sorry for the novice question:

I am trying to use the extremes component but it does not seem to work the way I expect it to. I currently have a list of numbers and I want to return the maximum and minimum values for the list. I thought that I'd just hook the list up to both the A and B inputs on the component and it would spit out my values, but instead it just spits out the list. The list has been completely flattened before being given to the component. Can anyone help me understand what the component is expecting, why this doesn't work, and how I should approach this?

Thanks!