3. [30] For the decision tree shown below, determine by computation the best course of action. $200 K profit 0.4 $150 K profit $100 K profit 0.3 $30 K loss $60 K profit 0.4 0.2 0.6 $70 K profit Decision 1 Choice B Invest $50 K 0.8 Decision 2 $50 K profit ChoiceC Invest $0 $0 profit