Please help.

Assume that a boundary condition u(0, t) = t, t > 0, was given together with a PDE whose unknown function u(x, t), where a E R and t > 0. Let U(x, s) be the Laplace transform of u(x, t). Applying Laplace transform to the PDE, the new 2:2 ODE has the general solution U(x, s) = ce- + $2 + 1 Then c = Select one: O No enough information are available to find c. O e $2 +1 O