20. Draw a decision tree for the three options described in problem 19. What should management do to achieve the highest expected payoff?21. The owner of Pearl Automotive Dealers is trying to decide whether to expand his current facility. If he expands and customer demand turns weak, there is a chance he could lease part of his newly constructed facility to another dealer. If he doesn’t expand and strong demand occurs, he could attempt to lease another facility across town. Analyze the decision tree in Figure A8. What is the best set of decisions and the expected payoff?