5. (a) (4 points) Match each of the following equations with the appropriate graph (you do NOT need to justify your answer). 3 (IV) . y = 2 cos (+ 7) . y =-2cos (I + 7) . y = 2 cos I - . y = -2cos (I - (b) Generate the graph of each of the following functions using the transfor- mation rules of graphs. i. (3 points) f() = cos(21) in the interval [-27, 2x] ii. (3 points) g(x) = - sin (x -) in the interval [0, 2x]