[ANSWERED] For the tripod space frame shown in Figure P5–72, determine standard steel pipe sections such that..

For the tripod space frame shown in Figure P5–72, determine
standard steel pipe sections such that the maximum bending stress must not
exceed 20 ksi, the compressive stress to prevent buckling must not exceed that
given by the Euler buckling formula with a factor of safety of 2, and the
maximum deflection will not exceed L/360 in any span, L. Assume the three
bottom supports to be fixed. All coordinates shown in units of inches.