question below:

Let f : R3 > R be a 01 function of w,y,z such that %(2) = 1, %{'(_5) = 0, %(2) = _2_ 1. Compute the directional derivative of f at (2, 5, 2) in the direction of the unit vector pointing in the same direction as (5, 4, 5) 5/sqrt(! 2. Compute the directional derivative of f at (2, 5, 2) in the direction of the unit vector pointing towards the origin. 33/sqrt