$11.$ Suppose your neighbor has a baseboard heating system powered by hydroelectricity, a $2000$ square foot home, and $5$ people live there. They normally keep the indoor air temperature at $18\backslash$deg C$.$ But times are tough and they plan to grow $$indoor crops$$ in their home to increase their income. Their internet resources indicate they must keep the indoor temperature at an uncomfortable, but tolerable, $25\backslash$deg C$.$ Your neighbors want to hire you as a consultant to estimate how much more energy each year they will consume $($i$.$e$.$ how much increase in the annual kWh on their BC Hydro electric bill$).$ What is your estimate rounded to the nearest $100$ kWh$?$

a$.10,400$ kWh

b$.11,200$ kWh

c$.12,800$ kWh

d$.21,600$ kWh