A,b,c,d please

Consider the function f(x,y,z) = 2 + 2xyz, the point P(1,1, - 1), and the unit vector u = a. Compute the gradient of f and evaluate it at P. b. Find the unit vector in the direction of maximum increase of f at P. c. Find the rate of change of the function in the direction of maximum increase at P. d. Find the directional derivative at P in the direction of the given vector. a. What is the gradient at the point (1, 1, - 1)? - 2 2 1 2