Consider the IVP y"+ 4y = sint u(t-2nt), y(0) = 1, y'(0) =0 ----- (I) [6](10 points) Without solving (1), sketch the solution y with the aid of a graphic calculator, show your equation setup, window setup with Osts10nt, copy your graph to the worksheet provided with the test. [7](10 points) Solve (1) using the method of LaPlace Transforms, identify y. and y in your solutions. Justify your conclusion