The Ix for a particular cross section is $3\mathrm{.}165i{n}^4.$ Find the ratio of the deflection of Beam A $($concrete$,$

$E=5\mathrm{.}5{10}^6)$ to the deflection of Beam $B($copper$,E=16{10}^6)$ to the deflection of Beam C

$($ABS$,E=3\mathrm{.}84{10}^5).{?}^1$ The load on each beam is $450lbf$ and have the same supported length of $12$

$ft.$

Report the ratio as ${}_A$:${}_B$:${}_C$ where the smallest of the values is set to $1$