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In April 1974, Steve Prefontaine completed a 10000m race in a time of 1663.6 s. Suppose \"Pre\" was at the 8550m mark at a time of 1500 s. If he accelerates for 60 s and maintains the increased speed for the duration of the race, calculate the acceleration that he had. Assume his instantaneous speed at the 8550m mark was the same as his overall average speed up to that time.

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