$8-7.$ A rectangular beam with cross section $b=14in.,h=24in.,$ and $d=21\mathrm{.}5in.$ supports a total

factored load of $3\mathrm{.}9$kip$\frac{s}{f}t,$ including its own dead load. The beam is simply supported with a $44-$ft span. It is reinforced with $(5)$ No$.7$ Grade $60$ bars, two of which are cut off between midspan and the support and three of which extend $10in.$ past the centers of the supports. $f_{c^{\text{'}}}=4000$psi. The beam has grade $60$ No$.3$ stirrups satisfying ACI Code Sections $9\mathrm{.}7\mathrm{.}6\mathrm{.}2\mathrm{.}2$ and $9\mathrm{.}6\mathrm{.}3\mathrm{.}3.$ Determine the cutoff location, measured from the support.