9 BC Petrol manufactures three chemicals at their chemical plant in Kentucky: BCP1, BCP2, and BCP3. These chemicals are produced in two production processes known as zone and man. Running the zone process for an hour costs $48 and yields three units of BCPI, one unit of BCP2, and one unit of BCP3. Running the man process for one hour costs $24 and yields one unit of BCPI and one unit of BCP2. To meet customer demands, at least twenty units of BCP1, ten units of BCP2, and six units of BCP3 must be produced daily. Assuming a linear relation- ship, use Excel solver to determine the optimal mix of processes zone and man to minimize costs and meet BC Petrol daily demands.