Determine the linear approximation of $h\left(y\right)=\sqrt{4y-5}$ at the point $a=2$.

$L\left(y\right)=\frac{2\sqrt{3}}{3}y+\frac{\sqrt{3}}{3}$

$L\left(y\right)=\frac{2\sqrt{3}}{3}y-\frac{\sqrt{3}}{3}$

$L\left(y\right)=\frac{2\sqrt{3}}{3}y+\frac{7\sqrt{3}}{3}$

$L\left(y\right)=\frac{2\sqrt{3}}{3}y-\frac{7\sqrt{3}}{3}$