Show all work for full credit. Problems 1-4: Compute the gradient of the function at the given point. (8 Points Each) 1) f(x, y) = 4x2 - 2y. (-3, -4) 2) f(x, y. z) = 2x - 3y + 8z, (-6, -9, 7)\fProblems 56: Find the derivative of the function at the given point in the direction of A. {10 Points Each} 5} f(x,y, z) = 2x 13* + 82, (9. 8.5). A = 3i 6] 2k :5) x, 3!, z) = |n(x2 23:2 + 422). (2, 2, 2). A = 3i+ 4i