5. Let C be the boundary of the triangle with vertices (0, 0)ã(1 Calculate f 4x2y dr +2ydy by using , 2), and (0,2) a) Green's Theorem b) Direct method along the lines C1, C2 and C3. Hint 1: Find the parametric form r (t) of each path, integrate, and add Hint 2: The two answers should be the same.