The cost of subcontracting in stage 1 adds 20% to the regular production cost. The Spring Company wants to establish a production schedule for regular and overtime production in each stage and for the number of tool heads subcontracted, at the minimum cost. Formulate a linear programming model for this problem and solve the model using the computer. Which resources appear to be most critical in the production process? Stage 1 Stage 2 Regular Overtime Regular Overtime Cost Cost Cost Cost 'I'rowd $61!} $6.20 $3.11! $3. 10 HUI: [0.00 10.70 5.00 5A0 Rate 3.00 3.5!] 41]] 4.30 Shovel I011] In?!) 51]] 5.4!]