3 OF 3 QUE Question 3 Choose all possible steps from the options below required to solve the following ODE using the method of reducti y" + 16y=0; y1 =cos(4x). Assume yz = uy] and w=u Prompts Submitted Answers Step 1 Choose a match Step 2 Choose a match Step 3 Choose a match Step 4 Choose a match Step 5 Choose a match Step 6 Choose a match Step 7 Choose a match Your work is saved as you go