Help Development > Q Search DB-1 (Win 20-21)) 15 20 30 How many elements are needed in the Z-function to minimize both fixed costs of ra variable transportation costs from roasters to the three cities? (1 Point) 20 5 15 31 If Y is used to represent the binary decision variable, Xij (i=a,b,c,d,e, j=1,2,3) to repres tons shipped, one of the following is the correct formulation for the constraint that repre the capacity of Roaster C: Points) Xc1 + Xc2 +Xc3 - 175Yc