Let g(x, y) = cos(x + 2y). (a) Evaluate g(4, −2). g(4, −2) = 1 Correct: Your answer is correct. (b) Find the domain of g. − π 2 ≤ x + 2y ≤ π 2 −1 ≤ x ≤ 1, − 1 2 ≤ y ≤ 1 2 −2 ≤ x ≤ 2, −1 ≤ y ≤ 1 −1 ≤ x + 2y ≤ 1 the set of real numbers2 Correct: Your answer is correct. (c) Find the range of g. (Enter your answer using interval notation.)