(a)[1]
From measurements taken on the front face of the cube in Fig. 4.1, work out the volume of the Blu-Tack in $\text{cm}^3$.
(b(i))[2]
From Fig. 4.3, count and note the number of $2\,\text{mm} \times 2\,\text{mm}$ squares covered by the cylinder’s end.
(b(ii))[1]
Use your response to (b)(i) to estimate $A$.