Design the shearwalls shown below for wind loading under the following conditions: $$ two storey office building framed with S$-$P$-$F lumber studs spaced at $400$ mm $$ OSB wall sheathing is applied directly to the studs $$ dry service conditions $$ factored roof diaphragm force acting on the shearwall $=30$ kN $$ factored floor diaphragm force acting on the shearwall $=40$ kN $$ roof and floor framing parallel to the wall $$ walls do not support any roof loads $($q$2=0$ kN$/$m$)$ walls support a factored floor dead load of $0\mathrm{.}5$ kN$/$m $($including a $0\mathrm{.}9)($q$1=0\mathrm{.}5$ kN$/$m$)$ walls are $3$ m high with a specified dead load of $0\mathrm{.}33$ kPa $$ depth of the roof and floor framing is $0\mathrm{.}3$ m