solve as as possible, 1 hour left. please answer question a,b,c,d

A cost payoff table is given as Cost Payoff Table State of Nature Decision s1 s2 di 1074 d2 409 718 503 396 654 d3 a. The optimistic strategy is: b. The pessimistic strategy is: c. The minimax regret strategy is: d. If the P(s)=0.2, P(sz)=0.5, and P(sz)=0.3, respectively, then the expected payoff strategy is