Engineering Mathematics - Vector Calculus

Let (x, y) ∈ R². The rate of change of the real valued function, V(x, y) = x² + x + y² + 1 at the origin in the direction of the point (1,2) is ________ (round off to the nearest integer).

If f = 2x³ + 3y² + 4z, the value of line integral ∫c gradf ⋅ dr evaluated over contour C formed by the segments (-3, -3, 2)→(2, -3, 2)→(2, 6, 2)→(2, 6, -1) is