$E_s=29{10}^6$

$f_c=4000p{p}^5$

$f_y=60,000$

$M=?$

$E_i=57000\sqrt[\phantom{2}]{f^{\text{'}}c}$

on the previous page

For the last: question, instead of using

$3$ #$8$ bar, use $4$ #$7$ bars

The value of $d$ will also change cover as cuell.