please help!

operator has been noled, as tollows: a) Cstablish Be upper and teeer controd lmhs. UCI, " (enter your meponse as a number beween ond fi, founded to moe decmal pacee). LCLp2 " (ender your response as a number betheen and t, rounded to tries uecinal placed. b) Why can the lower contiol imat not be a negative number? A. Since the viper control limit cannot be a negative number B. Since the percent of defective ieconds cannot be a negative numbed. C. Since the gercent of defective recards is always a postive number. D. Since the upger controi lenit is pes tive