1. (a) Rewrite the following integral as in iterated integral in the order dx dy dz 1-y LEG f(x, y, z) dz dy dx (b) Use spherical coordinates to evaluate √√√4-y² 4-x2-y² ²√x² + y²+ 2ª dz dz dy evaluate z dV. 32 (c) If E is the region bounded by the planes y = 0, z = 0, x + y = 2, and x² + z² = 1 in the first octant,