If anyone can help with these questions that would help out so much. Thanks.

use the binomial theorem to write the following 13. the sixth term in the expansion of (a + b)" find the following probability 14. suppose the time required for an auto shop to do a tune-up is normally distributed with a mean of 102 minutes and a standard deviation of 18 minutes. What is the probability that a tune-up will take less than 66 minutes? sketch the following normal curve 15. a data set is normally distributed with a mean of 180 and a standard deviation of 15. Sketch a normal curve for the distribution. Label the x-axis values at one two and three standard deviations from the mean