5. In the unbalanced transportation problem in Table 3, if a unit from a source is not shipped out (to any of the destinations), a storage cost is incurred at the rate of $5, $4, and $3 per unit for sources 1, 2, and 3, respectively. Additionally, all the supply at source 2 must be shipped out completely to make room for a new product. Use Vogel's starting solution and determine all the iterations leading to the optimum shipping schedule. Table 3 $1 $2 $3 $4 $2 $3 30 20 $1 20 $5 40 $3 30 20