Task $4$ Use Australian Standards AS $3600$ and relative code with the given data to determine the total load of Reinforcement concrete column C$1,$ C$2,$ C$5$ and C$6.$

Given data:

Thickness of slab $=160mm,$ and the beam is $300400mm$ in $y-$direction and $300500mm$ in $x-$direction. The column is $500500mm$ and the height is $5m.$ Live load is $4K\frac{N}{m^2}.$ Steel in slab, beam and column are $1\mathrm{.}5\%,2\%$ and $2\mathrm{.}5\%$ respectively.