Problem $1)$ Determine the maximum and the minimum normal stresses at the base of Column C $4$ for the loads given below. Consider a $50mm100mm$ rectangular section.

Problem $2)$ For the column in Problem $1$ and adopting Douglas$-$Fir wood, would this section be considered satisfactory in terms on bending stresses? Additional information: Allowable Bending Stress $=6$MPa. If not, select the most economical rectangular section for this case $($see Appendix E of the Strength of Materials book$).$