Overconfidence refers to an individual who overestimates the accuracy of his own judgment based on the future development of things, and then deviates from the form of calibration. The degree of calibration here depends on how well the confidence matches the relative frequency of related target events. Based on the above definitions, Which of the following are overconfident:. ['A company increased its revenue growth rate in the previous quarter based on relevant statistics.', 'A stock analyst predicts that the stock index will rise, but the stock falls.', 'Zhang believes that he can take more than 90 points in his final exam, but only 70 points.', "A football commentator stated that the probability of Team A winning is 80%, but previous data shows that the commentator's prediction accuracy is only 30%."]