7) What is the numeric value of s4, that is, slack variable 4. Use the paragraph and two tables in the Packet to answer this question.

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PROBLEM D: There are two Solver prinouts: (1) the optimal results output (top) and (2) the optimal Sensitivity Analysis (bottom). The cells with question marks ("?") are numbers which have been hidden. Use the paragraph and two tables given on the Packet to answer this problem. Notes: The x are outputs X1 to X9. There are 5 inputs, and thus 5 input constraints. At the optimal solution the maximum total revenue (TR) is greater than zero. Production Activity XJ X7 TR ? Amount Produced ? ? ? ? ? ? ? ? Per Unit Price ? 2 ? 2 Constraints Resource Usage Total LHS RHS Slack Constraint 1 5 10 15 10 20 25 10 50 ? Constraint 2 10 5 20 5 5 5 25 10 15 40 ? Constraint 3 15 20 0 3 5 20 20 25 10 45 ? Constraint 4 5 5 5 7 7 5 5 5 5 ? Constraint 5 5 5 5 14 4 5 5 5 5 5 ? Variable Cells Final Reduced Objective Allowable Allowable Cell Name Value Cost Coefficient Increase Decrease $B$4 Amount Produced x1 ? -6 ? 6 1E+30 $C$4 Amount Produced x2 ? -2 ? 2 1E+30 $D$4 Amount Produced x3 ? -16 ? 16 1E+30 SE$4 Amount Produced x4 ? o ? 1E+30 $F$4 Amount Produced x5 ? -2 ? 2 1E+30 $G$4 Amount Produced x6 ? -1 ? 1 1E+30 SH$4 Amount Produced x7 ? -23 ? 23 1E+30 $1$4 Amount Produced x8 ? -9 ? 9 1E+30 $J$4 Amount Produced x9 ? -13 ? 13 1E+30 Constraints Final Shadow Constraint Allowable Allowable Cell Name Value Price R.H. Side Increase Decrease $K$8 Constraint 1 Total LHS 0 LE+30 18 $K$9 Constraint 2 Total LHS ? 1.2 ? 22.5 33.75 $K$10 Constraint 3 Total LHS ? 0 ? LE+30 21 SK$11 Constraint 4 Total LHS 0 ? 51 1E+30 $K$12 Constraint 5 Total LHS ? 0 ? 27 1E+30