Let S be the unit sphere with outward normal. Consider the surface integral [[ (x(y² − 2² + 1)i + y(2² − x² + 1)j + z(x² − y² + 1)k) · dS a. Compute the surface integral by using the definition of surface integrals. (Hint: the outward normal at the point (x, y, z) on the sphere is a multiple of (x, y, z).) b. Compute the surface integral by evaluating the triple integral of an appropriate function.