The trade magazine QSR routinely checks the drive-through service times of fast-food restaurants. A 95% condence interval that results from examining 695 customers in Taco Bell's drive-through has a lower bound of 156.6 seconds and an upper bound of 160.0 seconds. Complete parts (a) through (c). 7.' u ( Wu . _......_.____..... .. , W H .. -/.,.i.., ._, (a) What is the mean service time from the 695 customers? The mean service time from the 695 customers is D seconds (Type an integer or a decimal. Do not round.)