Find the vertical, horizontal, and oblique asymptotes, if any, of the given rational function.

r(x)= x^3-64÷x^2+x+20

a.
the vertical asymptote(s) is/are x equals=

(simplify your answer. use a comma to separate answers as needed.)
b.
there is no vertical asymptote.
find the horizontal asymptote(s), if any, of the function. select the correct choice below and fill in any answer boxes within your choice.
a.
the horizontal asymptote(s) is/are y equals=

(simplify your answer. use a comma to separate answers as needed.)
b.
there is no horizontal asymptote.
find the oblique asymptote(s), if any, of the function. select the correct choice below and fill in any answer boxes within your choice.
a.
the oblique asymptote(s) is/are y equals=
nothing.
(simplify your answer. use a comma to separate answers as needed.)
b.
there is no oblique asymptote.
click to select and enter your answer(s).