Situation $3-$ Refer to tripod shown.

Dimensions:

$a=0\mathrm{.}6m$;$b=1\mathrm{.}35m$;$c=1\mathrm{.}35m$;$h=1\mathrm{.}35m$

Member properties:

Area $=690m{m}^2$

Radius of gyration $=15\mathrm{.}5mm$

$F_y=248$MPa

Compute the allowable compressive stress $(MPa)$ of member $AC.$

A$.67\mathrm{.}7$

B$.61\mathrm{.}8$

C$.78,7$

D$.87\mathrm{.}6$

Compute the maximum vertical load $W(kN)$ that can be supported at A$.$

A$.107$

B$.83$

C$.98$

D$.47$

If the load at A is horizontal along positive $x-$axis, what is the maximum value of the horizontal load $(kN).$

A$.107$

B$.83$

C$.98$

D$.47$