5.1 Formulate the following problem (by hand) to represent the generic optimization format shown in Eq. (5.15) to (5.20) of the textbook. X min f (x) = 5x7 - 23x1*2 - 9x3 + 9x3 + 15 subject to X1X3 = 100 4x1 - 19x2 = 50 3x1 + 4x3 = 100 x1 +x2+x32-10 -500