please i dont have much time can u answer me fast i will rate promise

answer me only section (c)

Q1: (Total: 60 points) a) Why is decreasing variability so important during data collection and sampling? b) Define product reliability? Pls draw reliability(defection inclination) curve. Provide detail about the phases of the curve. c) Pls explain briefly the necessity and benefit of collecting data and using statistical methods in production processes. Pls list types of data collected and analyses implemented (graphics followed) with their reason