Use $f_c^{\text{'}}=4,000,f_y=60,000,$ and span length $=17-$ ft $($simply supported$).$ Please see

the equations and beam section below. $(35$ pts$.)$

$I_e=(\frac{M_{cr}}{M_a}{)}^3{I}_g+[1-(\frac{M_{cr}}{M_a}{)}^3]I_{cr}$

$=\frac{5w{l}^4}{384E_c{I}_e}$

Question is about civil engineering, please provide solution.