Limits Continuity And Differentiability

If \(f^{\prime \prime}(x)\) is continuous at \(x=0\) and \(f^{\prime \prime}(0)=4\), then find the following value.
\(\lim _\limits{x \rightarrow 0} \frac{2 f(x)-3 f(2 x)+f(4 x)}{x^2}\) is equal to