Select a single$-$angle equal legs tension member to resist a design load of $55$ kips $(P_u=55$kip $).$

The member is to be $20$ ft $.$ long, assume an end connection consisting of $(3)-3/4-$in bolts, $3-$in

on center as shown in the Figure. Design a $3^{\frac{1}{2}}$ X $3^{\frac{1}{2}}$ in$.$ size angle $(3^{\frac{1}{2}}$ X $3^{\frac{1}{2}}x?)$ tension

member using AISC$-$LRFD specifications and A$36$ steel with Fy $=36$ksi.