Find the slope of the tangent line to:

a. the parabola $y^2 = 3 x$ at the point $\bigl( 12, 6 \bigr)$;

$m =$

b. the ellipse $x^2 + \frac{1}{3} y^2 = 1$ at the point $\bigl( \frac{1}{3}\sqrt{6}, 1 \bigr)$;

$m =$

c. the hyperbola $x^2 - y^2 = 1$ at the point $(3, 2\sqrt{2} \, )$.

$m =$