The temperature at a point (x, y,z) is given by T(x, y,z)=200e−x2−y2/4−z2/9, where T is measured in degrees Celsius and x, y, and z in meters. There are lots of places to make silly errors in this problem; just try to keep track of what needs to be a unit vector. Find the rate of change of the temperature at the point (1, -1, -1) in the direction toward the point (-2, -2, 4).