The following payoff tables represents COSTS.

$\backslash$table$[[,$S$1,$S$2,$S$3],[$D$1,10,16,25],[$D$2,22,18,8],[$D$3,15,15,12]]$

Which decision alternative should be chosen, if the decision maker uses the optimistic approach?

Choose

Which decision alternative should be chosen, if the decision maker uses the mini$-$max regret approach?

Which decision alternative should be chosen, if the decision maker uses the equal$-$likelihood approach?

If the decision maker chooses D$1,$ what is the most regret possible?

Max regret $=$

If $P(S1)=\mathrm{.}25$;$P(S2)=\mathrm{.}5$;$P(S3)=\mathrm{.}25,$ then the expected value of perfect information is:

$E\frac{V}{P}$I $=$