The Quality Control Manager for ENTA Inc -Construct the Regret Table

The quality control manager for ENTA Inc. must decide whether to accept (A1), further analyze (A2), or reject (A3) a lot of incoming material. Assume the following payoff table is available. Historical data indicates that there is 30% chance that the lot is poor quality (S1), 50 % chance that the lot is fair quality (S2), and 20% chance that the lot is good quality (S3).
$$\begin{array} { l r r r } & \mathbf { S } _ { \mathbf { 1 } } & \mathbf { S } _ { \mathbf { 2 } } & \mathbf { S } _ { \mathbf { 3 } } \\\mathbf { A } _ { \mathbf { 1 } } & 20 & 30 & 90 \\\mathbf { A } _ { \mathbf { 2 } } & 60 & 70 & 10 \\\mathbf { A } _ { \mathbf { 3 } } & 80 & 50 & 40\end{array}$$
-Construct the regret table.