Question 5 {0.5 points) Suppose f{$,y, z) : 32w + Ely22} [a] At the point {1,4,2}, find the direction in which the maximum rate of change of flx,y,z) occurs. [b] What is the maximum rate of change of the function at the point {1,4,2}? Enter ~grour answer in the blank blow. Round your answer to two decimal places. Your