Handouts 3 and 4 were given out in class in hardcopy.
The optional hmwk (described in Handout 4) involves
either writing a computer program to implement the 2-stage method
or setting up and solving (using a computer package) a McDonald diet
problem. You could ask a classmate for a copy if you are interested.
It's due tomorrow, so you won't have much time to work on it...