(a)[6]
Complete the table to provide the mechanism names for reactions 1 and 6, together with the reagents and conditions needed for reactions 1, 2 and 6.
(b(i))[3]
In reaction $3$, the organic molecule reacts with $\text{HCN}$ and a $\text{KCN}$ catalyst. Complete the diagram so that it shows the mechanism taking place. Include every relevant dipole, lone pair and curly arrow in your answer.
(b(ii))[2]
Name the functional groups present in the product of reaction $3$.
(c)[1]
Draw the structure of the organic molecule $W$ produced in reaction $4$.