17. + -/0.55 points Evaluate the line integral by the two following methods xy dx +x2 dy C is counterclockwise that consists of three segment: C1: from (5,0) to (5,3); C2: from (5,3) to (0,3); C3: from (0,3) to (0,0) (a) evaluate the line integral along C directly (b) use Green's theorem to evaluate the line integral