Folowing are five series of costs A through E measured at various volume levels. Identity each series as either fixed, variable, mixed, step-wise, or curvilinear. Volume (Unita 0 400 800 1,200 1,600 2,000 2.400 Serie A $ 0 3,200 5,600 8,100 9,600 15,000 18.900 Series B $10,000 10,000 10,000 10,000 10,000 10,000 10.000 Series C Series $ 0 $2,000 3,600 2,600 7,200 3.200 10,800 3.800 14,400 18,000 5,000 21.600 5.600 Series E $5,000 5.000 .000 .000 12,000 12,000 13.000 Series A Series B Series C Series D Series E Following are five series of costs Athrough E measured at various volume levels. Identify each series as either fixed, variable, mixed, step-wise, or curvilinear. Volume (Units) Series $ 0 400 3,600 800 7,200 1,200 10,800 1,600 14,400 2.000 18.000 2.400 21,600 Series $2,500 3,100 3,700 4,300 4,900 5.500 6.100 Series C $ 0 6,000 6,600 7,200 8,200 9.600 13.500 Series D Series E $1,000 $5,000 1,000 5,000 2,000 5,000 2,000 5,000 3,000 5,000 .000 5.000 4.000 5.000 Series A Series B Series C Series D Series