(a)[2]
Complete the table entries for Diagram 5 and Diagram 6.
(b)[1]
Write an expression, in terms of $n$, for how many white dots there are in Diagram $n$.
(c(i))[1]
Determine the total number of dots in Diagram 8.
(c(ii))[2]
Find an expression for the number of black dots in Diagram $n$, and give your answer in its simplest form.
(d)[5]
Find the values of $a$ and $b$. You must show all of your working.