$2$

Multiple Choice

$20$ points

The timber beam AB of span $6$ ft and nominal width $4$ in $($actual width $=3\mathrm{.}5$ in$)$ is to supvort three concentrated loads $($free body diagram is shown$)$ Determine the forces indicated by aa and bb and from the sketched shear force $($SF$)$ and bending moment $($BM$)$ diagram from the free body diagram shown.

Determine also the values of items cc$.$ dd$,$ ee$.$ ff$,$ gg$.$ hb$,$ and ii$.$ Select the right group of answers from the listed groups $($I to IV$).$ Please. note the maximum SF and BM because you will need them to answer another question.

I$)$ bb $=2$;$cc=1$; dd $=1$; ee $=1$;

$ff=3$;$gg=3$kip$-ft$;$hh=3$kip$-ft$;$ii=4$kip$-ft$

II$)$ ; ee $=1$; $ff=3$;$gg=3$kip$-ft$;$hh=4$kip$-ft$;$ii=3$kip$-ft$

III$)$

$]=2$;$bb=3$;$cc=1$;$dd=1$;$ee=1$

$ff=3$;$gg=4$kip$-ft$;$hh=3$kip$-ft$;$ii=[4$kip$-ft$

IV$)$

$]=2$;$bb=3$;$cc=1$;$dd=4$;$ee=1$

$ff=3$;$gg=4$kip$-ft$;$hh=3$kip$-ft$;$ii=[2$kip$-ft$

Show work pleade