1. A column has the dimensions shown in the diagram below.

(a) What is the minimum length of the column at which buckling is likely to occur?

(b) If the column is the length determined in (a),

(i) What will be the mode of failure?

(ii) At what load would you expect failure to occur?

(c) If the column is half the length determined in (a):

(i) What will be the mode of failure?

(ii) At what load would you expect failure to occur?