For the concrete column shown below, b $=250$ mm$.$ h $=400$ mm$.$ d$\text{'}=65$mm$.$ The column is reinforced with $6-25$ mm diameter rebar with fy $=415$MPa. F$\text{'}$c $=27$ MPa

$1.$ What is the total compressive force $($nominal$)$ in concrete under balanced condition? $($Ans$.965\mathrm{.}8$ kN $)$

$2.$ What is the ultimate axial design capacity of the column in kN$?($Ans$.1794$ kN $)$

$3.$ What is the nominal axial load capacity of the column in kN$?($Ans$.2760$ kN $)$

$4.$ What is the balanced eccentricity? $($Ans$.290$ mm $)$

$($I need detailed solutions for my complete understanding, please. Thank you!$)$