A Methods and Measurements Analyst needs to develop a time standard for a certain task. In a preliminary study, he observed one of his employees perform this task five times, with the following results:OBSERVATION$12345$TIME $($SECONDS$)8476808476$What is the standard time $($ST$)$ for this task if the employee worked at a twenty$-$five percent faster pace than the average and an allowance of twenty percent of the workday is used? Select one:a$\mathrm{.}125$ secondsb$\mathrm{.}100$ secondsc$\mathrm{.}80$ secondsd$\mathrm{.}120$