please solve all parts.If any data is missing then you can assume data as you wish

Using the method of undetermined coefficients, a particular solution of the differential equation y" + y' - 2y = x2 - 1 is: -1/4-1/2 x^2-1/2 x -1/4-1/4 x^2-1/2 x O -1/4-1/2 x^2-1/3 x O None of them Solving by variation of parameter y" - 3y' + 2y = 3e*cosx, the value of Wronskian W is: None of them O e 2x O ex O e43x By writing the summation of the two power series En=3 (n - 2)(n + 1)cnx -3+ Enzo CnX" = 0, we obtain: Era[(k + 1)(k +4)c. + Culx* = 0 EX, [(k + 1)(k + 4)Ca+ + Calx* - 0 the following the following Er .[(k + 1)(k+4)Cx+3 + calx* = 0