A shop may sell cardboard hats or umbrellas with the colors of the teams during a sporting event. However, the seller has to place his order 15 days before the match date and can only order one of the hats or umbrellas. The seller's profit also depends on the weather, which is the environmental uncertainty on the match day. (Select the weather as rainy, cloudy and sunny, and your alternatives as cardboard hats and umbrellas. Based on the event above, create a decision matrix whose values you will give yourself. Each student will determine the values in the decision matrix himself/herself. Write down the corresponding gain values for each alternative and environmental uncertainty in the decision problem. Make your decision according to the criteria below. a. Optimism b. Pessimism c. Regret