The question already say to state in a&b mah so got no other choice. The previous question didn’t specify to leave in a&b and they already give you info to find the f(x) so can use full equation rather than in a&b.

Same approach though. When draw graph just ask yourself what y becomes when x approaches slightly less than -a and what happens to y when x approaches slightly more than -a. Ask yourself also what happens to y when x approaches + ∞ and also -∞. This way you will know when & which asymptote the graph comes close to.