12.2.1  Sketch the  D/A-command  versus  TG feedback for the following machining action.  Keep the reference to time and voltage the same in all four questions.
    a.)  Feed move at 200 in/min, 2 inches long.
    b.)  Feed move at 100 in/min, 1 inch long.
    c.)  100% Rapid move at 400 in/min, 40 inches long.
    d.)  25% rapid move, 2 inches long.