Considering your answers from problems $1$ to $2$:

a$)$ Explain using simple words what is inertia of a section. Why inertia has different values for axis X and Y of the sections presented earlier?

b$)$ Which section has higher inertia with respect to X axis?

c$)$ Considering these sections are in tension only. Which section would be more effective

to use for your structure?

d$)$ Considering these sections are in bending only. Which section would be more effective

to use for your structure?