need help to solve this problem.........................

Show your works 1. Use the transformation x=2u+v, y =u+2v to evaluate the integral f [R (x 3y)dA where R is the triangular region with vertices (0,0), (2,1) and (1,2) ..... 2. Show that the line integral fr; ydx + (x + 2y)dy is dependent of path. Evaluate the integral C is any path from (0,1) to (2,2) 3. Find the parametric representation for the part of the ellipsoid 9X2 + 4y2 +22 =1 that lies above w-plane. $2 9: 4. Evaluate the integral HS yz 615' Where S is the part of the plane X + y + z = 1 that lies in the rst octant