Comments:

10 points each for 87, 95, 96, 103
20 each for the others

On 2-88 I made the Why? part worth only 5 as many studends didn't realize they
were supposed to do it and the book was somewhat unclear.

Grades ranged from 69 to 100, average of 84, 20 homeworks turned in

This was mostly good, with a couple exceptions

Most people overcomplicated 2-99. All you needed to do was use that little
equation at the bottom of page 69, but a lot of people unnecessarily used
matrices and jacobians and whatnot.

I think that I have never seen the students have as much trouble on a
single problem as they did on 2-103. You need to show that the derivative of
that expression equals 0 before you set t=1, not after. Just about everybody
(all except 2, I believe) butchered the multivariable chain rule and missed a
factor of 1/t that they ought to have had.