Select $b,d,h$ and the reinforcing steel for $36ft.$ simply supported rectangular beam,

which supports its own weight plus a uniform live load of $1\mathrm{.}4\frac{k}{f}t$ and an additional deal

load of $0\mathrm{.}5\frac{k}{f}t.$ Use $f^{\text{'}}c=4000$ and $f_y=60000.$ Check the reinforcing steel

placement using $1-1/2"$ clear cover and #$3$ double leg stirrups. Keep design strength

within $20\%$ of required strength $($iterate if necessary$).$

How would increasing the design compressive strength to $6,500$ psi impact your design

for Problem $1.$ Note: you should not need to work through the entire problem again, but

show some of the analyses required to make your assessment.

Pls solve $1$ and $2$ and explain, thank you so much