(a(i))[3]
As the wave enters the gap in the harbour wall and travels into the harbour, draw the first three crests to the right of the harbour wall on Fig. 6.1.
(a(ii))[1]
Use Fig. 6.2 to draw the first three crests to the right of the harbour wall.
(b)[3]
For each wave type, put one tick to show whether it is longitudinal or transverse.