5. Let 313:1? ,z} = 1,33: +yz. point 1" = {1.311} and L1 =( 1. Find the gradient of f. 2. Find the rate of change of f at the point J\" in the direction of the vector u. 'I-JIM g ? Hum }_ 1' 1' 3. What is the maximum rate of change of f at the point J\"? In what direction does it occur? E. Find the local maximum and minimum values and saddle point[s] of the function. f(:r:,y} = sin[:s)sin{y}, 1T 6: .1: <: i: y :1 i find the absolute maximum and minimum values of f on set l fir-2.2: a: a e.>