Calculate the heating load for a hall $(20$ m long, and $10$ m wide$),$ if the inside temperature is $23$C$,$ RH$=50\%,$ and the outside air temperature is $4$C$,$ RH$=60\%.$ The walls are made of $70$ mm stone,$200$ mm concrete, $100$ mm block cement, and $20$ mm plaster. Windows are made of sliding aluminum profile $2$ windows $2$mx$1\mathrm{.}2$ m$$ if kg$=0\mathrm{.}5$ wind speed is $10$ m$/$s$.$ the hall has a multi$-$lock door made of steel $40$ mm thick $1$m wide $2-$meter$-$high steel frame no storm door. The hall has $25$ students inside and $25$ laptops with $30-$watt heat emitted from each, and lighting load of $20$ watts per m$2.$Find the heating load. $(20$ Marks$)$