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(6) [Bonus] Devore 2010] The alternating current (AC) breakdown voltage of an insulating liquid indicates its dielectric strength. The article "Testing Practices for the AC Breakdown Voltage Testing of Insulation Liquid" (IEEE Electrical Insulation Magazine, 1995: 21-26) gave the accompanying sample observations on breakdown voltage (KV) of a particular circuit under certain conditions. 62 50 53 57 41 53 55 61 59 64 50 53 64 62 50 68 54 55 57 50 55 50 56 55 46 55 53 54 52 47 47 55 57 48 63 57 57 55 53 59 53 52 50 55 60 50 56 58 (a) Construct a boxplot of the data and comment on interesting features. (R or Excel are good options.)(b) Calculate and interpret a 95% CI for true average breakdown voltage p. Does it appear that a has been precisely estimated? Explain. (c) Suppose the investigator believes that virtually all values of breakdown voltage are be- tween 40 and 70. What sample size would be appropriate for the 95% CI to have a width of 2 kV (so that / is estimated to within 1 kV with 95% confidence)