C. Arrange each of the following sets of compounds in order of increasing boiling point temperature: HCl,H2O,SiH4 b. The range of the function f(x,y) is (,). (Type your answer in interval notation. Use a comma to separate answers as needed.) c. Choose the correct description of the level curves of f(x,y)=4y5x. Straight lines Circles Hyperbolas Ellipses