Suntrek, a global apparel company, is adding a new supplier for denim fabric that it uses to manufacture denim jeans, and the suppliers it's considering are located near the ports of Shanghai, Mumbai, Manila, Santos, and Veracruz. A major factor in the company's decision is transportation and shipping costs, which are dependent on several factors including port traffic, container costs, and future oil prices. The following payoff table summarizes the total monthly shipping costs (in $100,000s) for the suppliers in each of the ports, given the future state of related logistics costs.

Determine the best decision using each of the following criteria.
a. Minimin
b. Minimax
c. Equal likelihood
d. Minimax regret

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Logistics Costs Port Decrease Same Increase Shanghai Mumbai Manila Santos Veracruz $2.7 2.1 1.7 3.5 4.1 $3.9 3.8 4.3 4.5 5.1 $6.3 6.5 6.1 5.7