In Problems 1 and 2, find the eigenfunctions and the equation that defines the eigenvalues for the given boundary-value problem. Use a CAS to approximate the first four eigenvalues A1, A2, A3, and A4. Give the eigenfunctions corresponding to these approximations. 1. "Ay = 0, y'(0) = 0, y(1) + y'(1) = 0 2. "Ay 0, y(0) + y'(0) = 0, y(1) = 0