A consumer's utility function is U(x1, x2) = XIX2 With a budgetary constraint 5x1+ 10x2 = 100. Which of the following statements about the stationary point of the Lagrangean is TRUE? a. The stationary point is neither maximizes nor minimizes the utility function. b. The stationary point does not exist. c. The stationary point minimizes the utility function. d. The stationary point gives a saddle point of the utility function. e. The stationary point maximizes the utility function