3. Minimize f(x, y) = (x y + 1) + y ex using Powell method. Use x = (-2,-0.5) as a starting point. The stopping criteria & = 0.001. Conduct one iteration only. Tabulate the ten values (from A to J in the allowed formulas sheets). These values are f(x1), , x2 (,)", 2, x3 (,), 3, Af, Ax Ax.