A streamflow forecasting model is in operation for Falls Lake is suggesting the following monthly net$-$inflows $($includes precipitation over the lake$)$ for the next three months starting from September $1999$: $1001$ cfs $($September$),613$ cfs $($October$)$ and $207$ cfs $($November$).$ Assume the outflow to be $385$cfs$.$ If so$,($a$)$ compute the end of the month storage for each month during the season, September$-$November and $($b$)$ compute the error in forecasting the storages in the reservoirs based on the observed storages in each month. The depth of evaporation $($in inches$)$ for each month during Sep$-$Nov is as follows: $0\mathrm{.}275,0\mathrm{.}250$ and $0\mathrm{.}200.$