iven the function 1 y)- 16-answer the following questions Find the function's domain. Find the function's range. Describe the function's level curves. Find the boundary of the function's domain. Determine if the domain is an open region, a closed region, both, or neither. Decide if the domain is bounded or unbounded. a. Choose the correct domain. OA. The set of all points in the xy-plane that satisfy x + y s 16. OB. The set of all points in the xy-plane that satisfy x+y2 16. C. All points in the xy-plane except those that lie on the circle x + y = 16. G. All points in the xy-plane. b. Choose the correct range OA 1 22 c. z4 c. Choose the correct description of the level curves. OA. Circles with no restrictions on the radi OB. Circles with radi>4. OC. Circles with radi