7. You are stranded on an island covered in
vegetation. To escape, you decide to build
a raft out of layers of reeds and small
branches.
(a) Would it be better to line up the reeds in
each layer and tie them together, or to
crisscross them and weave them together?
(b) Would it be better to line up the reeds in each layer in the same direction as the layer below, or should the reeds in each layer point in different directions, explain.