Problem

PART 1: Fill in the blanks.

• Work need not be shown, only answers will be graded.

• 4 points for each blank and 100 points total.

• Each answer need to be clearly labeled on the answer sheet.

• Use of any device with computer algebra system during the exam will result in zero points.

19. Let $C$ be the curve consisting of line segments from $(0,0)$ to $(2,1)$ to $(1,2)$ to $(0,0)$.

$\displaystyle\int_C (x-y)\,dx+(2x+y)\,dy=\underline{\quad(24)\quad}$.