$3.$ Consider the following inverted Pratt truss.

a$)$ Choose one HSS designation that can safely resist the forces and satisfy slenderness requirements $(\backslash (\backslash$mathrm$\{$L$\}/\backslash$mathrm$\{$r$\}<mn>2</mn><mn>0</mn><mn>0</mn><mtext></mtext><mi>\backslash </mi><mi>)</mi><mtext></mtext><mi>)</mi>$ for all truss members in the top chord $($the $6$ horizontal trusses at the top$)$

b$)$ Choose one HSS designation for all truss members in the bottom chord $($the $4$ horizontal trusses at the bottom$)$

c$)$ Choose one HSS designation for all diagonal truss members $(6$ total$)$

d$)$ Choose one HSS designation for all vertical truss members $(5$ total$)$