(a)[1]
Write the mathematical name for this solid.
(b(i))[1]
On the grid, draw Diagram 4.
(b(ii))[2]
Fill in the table.
(b(iii))[2]
Find an expression, in terms of $n$, that gives the number of tiles in Diagram $n$.
(b(iv))[1]
Find how many tiles are in Diagram 19.
(b(v)(a))[2]
Diagram $x$ is built from as many tiles as can be taken from this box. Find the value of $x$.
(b(v)(b))[1]
After Diagram $x$ has been made, how many tiles remain in the box?