The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 90% confidence interval that results from examining 502 customers in Taco Bell's drive-through has a lower bound of 162.2 seconds and an upper bound of 167.2 seconds. Complete parts (a) through (c). (a) What is the mean service time from the 502 customers? The mean service time from the 502 customers is 164.7 seconds (Type an integer or a decimal. Do not round.) (b) What is the margin of error for the confidence interval? The margin of error iseconds. (Type an integer or a decimal. Do not round.) C...

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