[填空题]
The function f is 6 .b7ten(7 otywz +hsh.u- piavy h h(:j(f1ts( ju i/ak:m;ueof the form $f(x)=\frac{a x+b}{2 x+c}$ , for $x \neq-\frac{c}{2}$ , where a, b, c $\in \mathbb{Z}$ . Given that the graph of y=f(x) has asymptotes x=-5 and y=2 , and that the point $\mathrm{P}\left(1,-\frac{1}{12}\right)$ lies on the graph, find the values of a, b and c . a = b = c =
