Using the approximate formula found in Eq. (3.107), show that divergence is possible for backswept wings when e < 0 and that in this case sweeping the wing forward may help to avoid divergence. Discuss the situations in which one might encounter a negative value of e. What sign of kappa would you expect to be stabilizing in this case? Plot the divergence dynamic pressure for a swept composite wing with GJ//EI=0.2 and e//=-.025 versus kappa=+-0.4 for varying Lambda.