For the given function, complete parts (a) through (f) below. f(x.y) = 8 (3x2 + sf) (1) (a) Find the function's domain. Select the correct choice below and, if necessary, ll in the answer box to complete your choice. C? A- The domain is all points (x.y) satisfying . (Simplify your answer. Type an inequality.) {:2} B. The domain is the entire xy-plane. (b) Find the function's range. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. C? A- The range is . (Type your answer in interval notation.) {:22- B. The range is all real numbers. (c) Describe the function's level curves. Choose the correct answer below