A sample of blood is assayed for its alcohol content (BAC). The following BAC values are determined from six trials:

0.081%, 0.078%, 0.079%, 0.076%, 0.082%, 0.077%

Assume the data follows a Gaussian distribution. For 84% of the possible assay data population determine with 93% confidence:
a. The two sided tolerance interval
b. The one sided upper bound tolerance interval
c. The one sided lower bound tolerance interval