$Q($Years$).$ A timber floor deck as shown in the figure, the properties of timber, $Fb=70\frac{kg}{c{m}^2},Fc=75\frac{kg}{c{m}^2},Fv=28\frac{kg}{c{m}^2},E=70000\frac{kg}{c{m}^2},W=1000\frac{kg}{c{m}^2},$ length of post $=4m,x-$section of post $=5**5cm,$ if $x-$section of plank $=3**14\mathrm{.}99cm$ and $x-$section of joist is $6**14\mathrm{.}99cm,$ allowable deformation of the plank $=0\mathrm{.}1cm,$ allowable deformation of the joist $=0\mathrm{.}1cm.$

Find :

$1-$ Check shear $,$ deformation and bending moment for both planks and joists

$2-$ Check safety of the post $.$