A) What standard normal z-score is associated with the bottom (or lowest) 2%? The probability is 0.02 that a standardized normal variable takes a value below what particular value of z? B) What...

A) What standard normal z-score is associated with the bottom (or lowest) 2%? The probability is 0.02 that a standardized normal variable takes a value below what particular value of z? B) What standard normal z-score is associated with the upper 99%? The probability is 0.99 that a standardized normal variable takes a value above what particular value of Z? C) What standard normal z-scores contain the middle 90%? The probability is 0.90 that a normal variable takes a value within how many standard deviations of its mean?