Q$2$: A building with a $120ft$ by $80ft$ roof, located in lat. $=32,$ has a roof $60\%$ of its area is single clear glass without shading and the remaining constructed of $1in.$ wood with $2-$in insulation and a suspended ceiling & the Occupancy: $80f{t}^2/$person$.($Inside and outdoor humidity ratios are $66$ and $101gr$ w$./lb$ d$.$a$.).$ The inside design condition is $78F.($Note: outside condition: outside temperature is $90F$ &daily range us $18F).$ Determine:

Time of peak roof heat gain

$2-$ The net cooling load at September $21$ at noon

$3-$ Cooling coil capacity $($for $30$ person$)$