7.

(a) What do you understand by unbalanced transportation problem? How would you convert it into balanced transportation problem?

(b) What is the indication that a given transportation problem has multiple optimal solutions?

(c) What would be the number of occupied routes in the optimal solution of an 'm-origins, n-destinations' transportation problem'?

(d) What is the indication that a given transportation solution is degenerate?

(e) How would you apply North-West Corner rule to find initial feasible solution if the first-source, first-destination route is prohibited?

(f) How would you explain the interpretation of the optimum solution of an unbalanced transportation problem?