In a study of physical activity, a group of female sprinters run on a trail for 10 minutes. Their hear rates in beats per minute at the end vary from sprinter to sprinter according to the N (119, 11.4) distribution. The heart rates for female non-sprinter after the same exercise have the N (129, 14) distribution. NOTE: N(119, 11.4) means normal distribution with mean of 119 and standard deviation 11.4. a) What percent of the sprinters have hearts rate below 131? b) What percent of the non-sprinters have heart rates above 131?

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