For f(x) = $4x^{2}+2x+5$ fill in the following table at x = 1:

 $x$ $f(x)$ $\Delta x = x-1$ $\Delta f = f(x)-f(1)$ $\frac{\Delta f}{\Delta x}$ 0.9 0.99 0.999 0.9999 1.0001 1.001 1.01 1.1

Use the table to estimate $f^\prime(1)$ =