M7.6 Bowman Builders manufactures steel storage sheds for commercial use. Joe Bowman, president of Bowman Builders, Inc. is contemplating producing sheds for home use. The activities necessary to build an experimental model and related data are given in the table below. IMMEDIATE ACTIVITY c PREDECESSORS c STANDARD TIME (weeks) 3 2 1 7 6 2 4 STANDARD COST $1,000 $2,000 $300 $1,300 $850 $4,000 $1,500 CRASH TIME (weeks) 2 1 1 3 3 1 2 CRASH COST $1,600 $2,700 $300 $1,600 $1,000 $5,000 $2,000