Which of the following statements is incorrect?
a) If there is a line of symmetry in a section, then this will also be a principal axis.
b) If the y and z axes are aligned along the principal axes, then all sections will have one orientation of the axes where the neutral axis will always lie along one of the principal axes.
c) An investment's risk is determined by systematic risk, which is measured by beta.
d) The capital asset pricing model is an important method for estimating the cost of capital used in practice.
