Using the function f(x)=4 - 1/(x+6)^2

Question

A.what is the doamin?
b.the range
c. the asymptotes

Answer 1

domain: all reals except -6
range: all real y < 4
asymp: y=4, x = -6

Answer 2

I was thinking that the asymptoes was y4,x= -6, and the domain was all real but the range I was incorrect. Thanks!