$1\mathrm{.}23$ The mass flow rate in a water flow system determined by col$-$

lecting the discharge over a timed interval is $0\mathrm{.}2k\frac{g}{s}.$ The scales

used can be read to the nearest $0\mathrm{.}05$ kg and the stopwatch is accurate

to $0\mathrm{.}2$ s $.$ Estimate the precision with which the flow rate can be cal$-$

culated for time intervals of $($a$)10$ s and $($b$)1$ min $.$