f(x) = x4 + 2x3 8x2 + 5x Golden-section search (x1--2, xus 1, es-196) By using Execl The solution: Homework #7 f(x)--(r4 +2x3 +8x2 +5x -2 GR= 0.618034 Iter xl xu x2 f(x2 test 0.1459 2841.64 0.1459 1756.23 0.41641 380.30 0.41641 235.04 0.31308 193.20 0.31308119.40 65.53 40.50 25.03 15.47 9.72 6.01 3.71 2.29 1.41 0.87 1 1.854102 -0.1459 -0.8541 0.5650 -0.8514a 1 1.145898 0.291796 -0.1459-2.1971 0.5650b 3 -0.8541 0.291796 0.708204 0.1459 -0.416410.5650 0.8092 b 4-0.8541 -0.1459 0.437694 -0.41641-0.58359 0.80920.4748 a 5 -0.58359 -0.1459 0.27051 -0.31308-0.41641 0.8330 0.8092a 6 -0.41641 -0.1459 0.1671840.24922 -0.31308 0.7763 0.8330b 7-0.41641 -0.24922 0.103326-0.31308 -0.35255 0.8330 0.8406b 20.8541 -0.35255 -0.35255 0.35255 -0.35255 0.34679 0.34679 0.34679 0.34679 -0.34763 -0.34763 8 -0.41641 -0.31308 0.063859 -0.35255-0.37694 0.8406 0.8350 90.37694-0.31308 0.039467-0.33747 -0.35255 0.8402 0.8406 b 10-0.37694 -0.33747 0.024392 -0.35255 -0.361870.8406 0.8394a 11-0.36187 -0.33747 0.015075 -0.34679 -0.35255 0.8408 0.8406a 12 -0.35255 -0.33747 0.009317-0.34323 -0.34679 0.8407 0.8408 13 -0.35255 -0.34323 0.005758 -0.34679-0.34899 0.84080.8408 a 14-0.34899 -0.34323 0.003559 -0.34543 -0.346790.8408 0.8408b 15 -0.34899 -0.34543 0.002199 0.34679 -0.347630.8408 0.8408b 16-0.34899-0.34679 0.001359 -0.34763 -0.34815 0.8408 0.8408 a l want to know how the process got like tha't