For the following problem, complete two iterations of the (a) steepest-descent method, (b) conjugate gradient method, and (c) BFGS method Let the starting design be (1,2,3,4).
Minimize
f(x₁, x₂, x₃, x₄) = (x₁–10x₂)2 + 5(x₃ – x₄)² + (x₂ – 2x₃)4 + 10(x₁ – x₄)⁴