Please solve both parts, first and second. Show all work and explanations needed. Thanks and will upvote. Based upon the support conditions and the column orientations, assign the proper Kfactor to Frames A$,$ B$,$ C$,$ and D$.$

Local buckling needs to be considered if elements of the section have slenderness ratio, in terms of the width$-$to$-$thickness ratio $\frac{b}{t},$ that is larger than upper limits$.$ Plate buckling for stiffened or unstiffened serves the theoretical background for these limits$.$ You may find the following