production schedule with the same production quantity each month possible. Min s.t. February Demand March Demand April Demand Change in February Production Change in March Production Change in April Production February Production Capacity s.t. February Demand March Demand April Demand Change in February Production Change in March Production Change in April Production February Production Capacity March Production Capacity April Production Capacity February Storage Capacity March Storage Capacity April Storage Capacity Find the optimal solution. (F,M,A,I1,I2,I3,D1,D2,D3,s1,s2,s3)=