Calculus

4. The pressure (in milibars) profile a particular region is defined as: P(x, y, z) = 1000 + 0.1(yz2 + x2z-xy? ) where the positions are in kilometers. You place a pressure prome at A(1, 2, 1) . Find the rate of change of the pressure that the probe will measure along the direction of V = (0, 1, 1)