A consumer's utility function is U(x1, X2) = XIX2, With a budgetary constraint 5x1+ 10x2 = 100. The Lagrangean is Select one: a. f(x1, x2) = x1x2[1(5x1 + 10x2 -100], where 1 is the Lagrange multiplier. b. f(x1,x2) = A(x1*2 + 5x1 + 10x2 -100], where 1 is the Lagrange multiplier. c. f(x1, x2) =Axix2 + A(5x1 + 10x2 -100), where 1 is the Lagrange multiplier, d. f(x1, x2) = x1*2 + 1(5x1 + 10x2 -100), where 1 is the Lagrange multiplier. e. f(x1,x2) = Axi*2 + 5x1 + 10x2 -100, where 1 is the Lagrange multiplier