normal distribution problems (it's a color by number that's why there are colors) .

7.) LIGHT BLUE Monique measured the performance times of 855 middle school orchestra concerts and found a normal distribution. The mean concert time was 48 minutes with a standard deviation of 5.9 minutes. How many concerts last no less than 54 minutes? 8.) LIGHT BROWN The horses at the North Park Stables have a mean height of 15 hands. After determining that the heights are normally distributed, the standard deviation is found to be 0.35 hands. What percentage of the horses are at most 15.5 hands tall? 9.) LIGHT PINK Mrs. Bornak's 72 students took a spelling test last week with a maximum possible score of 30 points. The students' scores are normally distributed with a mean score of 22. How many students scored less than 24 given that the standard deviation was 2.6