(i) The first 3 terms, in ascending powers of \(x\), in the expansion of \((2+bx)^8\) can be written as

\(a+256x+cx^2.\)

Find \(a\), \(b\) and \(c\).

(ii) Using the values found in part (i), find the term independent of \(x\) in the expansion of

\((2+bx)^8\left(2x-\frac3x\right)^2.\)