3. (a) Find the first 4 terms of the binomial expansion, in ascending powers of \(x\), of
$$\left( 1 + \frac { x } { 4 } \right) ^ { 8 }$$
giving each term in its simplest form.
(b) Use your expansion to estimate the value of \(( 1.025 ) ^ { 8 }\), giving your answer to 4 decimal places.