Answer
Refer answer below.
Work Step by Step
a. Domain : A set of all points $(x,y)$ outside when $x^2+y^2 =9$
b. Range: The range is $z \lt \ln 9$
c. The level curves are the circles whose center is at (0,0) with radius $r \lt 9$
d. Boundary point lies at the circle $x^2+y^2=9$
e. Open
f. Bounded
