I got this question wrong on a test, I know I set up my expression incorrectly but I don't know how/where. Can I please ask that when you reply, to include as much detail as possible so I understand how I went wrong?

Find the derivative of the function P_0 in the direction of A. f(x,y,z)=xy+yz+zx, P_0(-2,2,-3), A=6i+3j-2k

Find the derivative of the function at Po in the direction of A. f(x,y,z) = xy + yz + Zx, Po( - 2,2, -3), A=61+ 3j-2k (DAD) (-2,2, -3) = -3 (Simplify your answer.)