The figure shows level curves of a function f(x, y). (a) Draw gradient vectors at P and Q. Is Vf(P) longer than, shorter than, or the same length as Vf(Q)? the same length as (b) If C is the line segment from P to Q, then Vf.dr (c) If C is any piecewise-smooth path from P to T to Q, then 7f.dr = (d) If C is any piecewise-smooth path from S to P, then Vf-dr (e) If C is any piecewise-smooth closed path from P to Q to T to S to P, then Vf.dr = 3 y 2 3 (Click on graph to enlarge) 41 35 29