A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. The analyst knows from past experience that whenever this process is under control, package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, the analyst randomly selected four packages and weighed each with the following results:DayWeight $($ounces$)$Monday$23222324$Tuesday$23211921$Wednesday$20192021$Thursday$18192019$Friday$18202220$If upper and lower control limits of $23$ and $17$ ounces are used, on what day$($s$),$ if any, does this process appear to be out of control?