The annual rainfall at station $x$ are given in table below. Rainfall gauges $1,2$ and $3$ are

independent rain gauges, each of which has already been tested and are known to be

functioning correctly. All the three gauges are located nearby to gauge station X$.$

$($i$)$ Check whether the data of station X is consistent

$($ii$)$ In which year was the change indicated?

$($iii$)$ Compute the mean annual rainfall for station X at its present $[2$ marks$]$

period first without adjustment and secondly with the present site for the given

in regime.

$($iv$)$ Compute the adjusted annual rainfall at station X for the affected period