Dear Irina,

Your score in Exam 2 is 88 out of 100

Everything was right except

#8: wrong answer, wrong way (but ineresting attept!)
the line integral is a scalar kind and grad(f) is
not relevant. -8 points (the type was right)

#9: right way, wrong answer (the integration is over
x^2+y^2<9 NOT [0,3]x[0,3] : -4 points
Also you forgot to multiply it by -1, the normal
is DOWNWARD

Otherwise you did a GREAT job. You really mastered the
material. Please review #8 it is so EASY, what a shame
that you messed up this one.

   Best wishes
        Dr. Z.