John faces the following decision problem:

With 5 h of study per day, John estimates that there are three different numbers of points he can get on the midterm: 80 with high confidence, 60 with average confidence, and 50 with low confidence. He also has two other possible actions:
studying 0 h per day and studying 10 h per day. Estimate the points he can get on the midterm in each of the three states: high, average, and low. Try to use the maximin criterion to choose the best action and specify the most points he can get on the midterm.

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Study hours per day 0 5 10 High confidence 60 80 90 Average confidence 40 60 80 Low confidence 30 50 60