$2.$ For the beams and loads given, select stirrup spacing if fc$=4000$ psi normal$-$weight concrete and fy$=60,000$ psi. The dead loads shown include beam weights. Do not consider movement of live loads unless specifically requested. Assume #$3$ U stirrups unless given otherwise. $(2$ marks$)$ Wp $=1$ k$/$ft w$2=2$ k$/$ft $24$ in$.27$ in$.28$ ft $4$ #$11$