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Consider the function F(xy) =e -x /5->/5 and the point P (1, - 1) a. Find the unit vectors that give the direction of steepest ascent and steepest descent at P b. Find a vector that points in a direction of no change in the function at P a. The direction of steepest ascent is The direction of steepest descent is b. Which of the following vectors points in a direction of no change of the function at P(1, - 1)? ur OA. (1,1) O B. (1,0) ving O c. (-1,1) OD. (0, 1)