You are asked to evaluate the surface area of the triangular portion of the plane 2x + 5y - z = 6 in the first octant. If the projection is on the xy-plane, which of the following would be the integrand (function inside the double integral)? O /4x2 + 25y2 + 1 O sqrt(7) O sqrt(30) O None of these. O sqrt(29) O sqrt(8) O 1