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	125
Outsource	20	45	80

1. Draw a complete decision tree for this question. Clearly present the decision and event nodes, the associated probabilities, and the payoffs.