1 The Transportation Problem Consider a transportation problem with four supply locations (A, B, C and D) and six demand locations (G, H, I, J, K and L). The supply quantities at A, B, C and D are 25, 17, 23 and 12, respectively, while the requirements at G, H, I, J, K and L are 16, 9, 8, 17, 18 and 7, respectively. These parameters, along with the unit transportation costs for each route are given in the Tab '\\ 1. The optimal solution to the above transportation problem is give R Demand city Q Supply city Unit transportation costs Capacity \\ Table 1: Inputs: Costs, capacities and demands. Table 2. Demand city Supply city Unit transportation costs @ 2: The optimal shipping solution. Answ gollo'wing questions Without using solver / excel.: 1. @at rate will the optimal cost change if the demand at city L we 0 change, i.e., how sensitive is the optimal cost to any change in