A stent for use in coronary surgery requires a special coating. Specifications for this coating call for it to be at least 0.05 millimeters but no more than 0.15 millimeters. Suppose the long-run average of this coating process is 0.09 millimeters. Further suppose this process's standard deviation is 0.015 millimeters. What proportion of the output from this process will fail to meet specifications?
Please show steps to solve, for explanation.