IE 450 NC Machining, Module #1 1. What is the one part of the inside of the machine that you do NOT spray with coolant during cleaning? 2. What does the FEED HOLD button do, and what does it NOT do? 3. What does the SINGLE BLOCK button do? 4. If you push the ATC/FWD button does the action occur automatically even if the doors are open? 5. What MODE do you have to be in so that pushing CYCLE START will run your program?