Solve the following differential equation by variation of parameters. Fully evaluate all integrals. y" + 6y' + 9y = 3r. a. Find the most general solution to the associated homogeneous differential equation. Use ci and cz in your answer to denote arbitrary constants, and enter them as c1 and c2. Yh help (formulas) b. Find a particular solution to the nonhomogeneous differential equation y" + 6y' + 9y = 3x. %3D Yp help (formulas) c. Find the most general solution to the original nonhomogeneous differential equation. Use c and cz in your answer to denote arbitrary constants. y = help (formulas)