a) For a standard normal distribution, find the probability a score is at most 0.83 standard deviations above the mean?  

b) For a standard normal distribution, find the probability a score is at least 0.83 standard deviations above the mean?  

c) For a standard normal distribution, find the probability a score is higher than 0.83 standard deviations below the mean?  

d) For a standard normal distribution, find the probability a score is lower than 0.83 standard deviations above the mean?  

e) For a standard normal distribution, find the probability a score is between the mean and 0.83 standard deviations above the mean?