Supplement A: The demand for a customized knee implants continues to increase at a large orthopedic hospital. The management is evaluating three different alternatives to meet the increasing demand: purchase of one or two 3D printers and the related software or outsourcing to a manufacturer. A consultants report indicates a 0.20 probability that demand will be low, 0.50 probability that demand will be moderate, and 0.30 probability that demand will be high. Potential profits/losses for different demand levels are presented in the below table.

Alternative	Payoff: Profit (in thousands) for Demand Levels
	Low	Moderate	High
Buy One 3D Printer	- 20	75	100
Buy Two 3D Printers	- 40	65	135
Outsource	20	45	80

1. Draw a complete decision tree for this problem. Clearly present the decision and event nodes, the associated probabilities, and the payoffs.
2. Which alternative should the management choose to achieve the highest expected payoff?