A velocity field is defined by V(x, y) = [2] Three paths C, C2 and C3 are shown below, where C is a circular arc with its centre at the origin, x is constant along C and y is constant along C3. O 2 Figure Q3 Evaluate directly the line integral of V(x, y) along the path C. (12 marks) (b) Evaluate directly the line integral of V(x, y) along the path C. (6 marks) Using Green's theorem, evaluate the line integral of V(x, y) along the path C3. (6 marks)