Find the first three terms, in ascending powers of \(x\), in the expansion of
$$( 2 + k x ) ^ { 5 }$$
where \(k\) is a positive constant. [0pt]
[3 marks]
8
Hence, given that the coefficient of \(x\) is four times the coefficient of \(x ^ { 2 }\), find the value of \(k\)