Question 2 (5 points) Find the general solution u(t,x) of the boundary value problem for the heat equation with homogeneous Neumann boundary conditions d_u(t,0) = 0, d,u(t,L) = 0. The Cn below denote arbitrary constants: u(t,x) ~k( E) sin| nnx 2141+ (Zn cos 2L u(t,x) ~K54 nnx Cn e sin Z u(t,x) VR (Zn 1)ix sin| 2L u(t,x) = We cannot find u(t,x) without an initial condition: None of the options displayed: u(t,x) cos u(t,x) cos