The overall project risk factor is known to be 0.6. The probability of dependency failure is twice the probability of complexity failure and four times the probability of maturity failure. The consequence of performance failure is twice the consequence of reliability failure, four times the consequence of schedule failure and eight times the consequence of cost failure. What is the probability of maturity failure? 
Definitions:
Upper Quartile
It is the median of the upper half of a data set, marking the 75th percentile, where 75% of the data points are below this value.
Standard Normal Distribution
A normal distribution with a mean of 0 and a standard deviation of 1.
National Achievement Test
It is an examination given annually in many countries designed to test the academic achievement of students in a variety of subjects.
Standard Deviation
A statistical metric that quantifies the variability or spread in a dataset or distribution.
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