Use 3 sections of an LM339 quad comparator for your comparators. Connect the inputs of the unused comparator section to ground. The outputs are open-collector, and can drive up to 10ma each, so you might be able to drive a small relay or LED. Otherwise, add transistor buffers to the outputs as needed.
Now comes the good part: Use a CD4053 for threshold voltage selection. The CD4053 is a triple SPDT analog switch. See the attached schematic for typical application. Be sure you pay attention to how you hook up the voltages. If you get them reversed, you won't have hysteresis - you'll have an oscillator.
Hopefully, you can figure out how to design the threshold voltage and hysteresis circuits. If you need help with that, post your request.
Obviously, you'll need 2 of the relay drive circuits and the 3rd one will drive an LED or some other indicator.