I. Evaluate the following integrals: (Use Multiple Integration Method)

3 1. y dx dy 4 2. 6x 2 + 9y 2 )dx dy 1-X-y 3. z dz dy dx1. y = 3x -x and the x - axis abouty = 0. 2. 2y = x ,y = 4andthey - axisabouty = 4. 3. v = x and x = y* about the y - axis