What is the EMV for decision alternative 1 (D1) if the payoff for (D1, S1) is $75,000; payoff (D1, S2) is $80,000, and payoff (D2, Sl) is $60,000 and payoff (D2, S2) is $130,000 given that the probability of Si is 80%. O a. 78,750 O b. 79,000 O c. Cannot be calculated 0 d. 78,500 O e. 76,000