choose a correct answer with solution

1. Solve the equation using Reduction of Order * (2 Points) (D2 - 5D + 6)y = 20 2. Solve the equation using Variation of Parameters * (2 Points) (D' + 1 )y = tanx y= a cosx + ca sinx - cos x In[secx + tanx] O y = a cosx + oz sinx - csex In[secx + cot x] 3. Solve the equation using Exponential Shift * (2 Points) (D2 - 2D + 2)y = 12x32x Op= e (a cosx + ca sinx) + ex (18x - 18x2 + 6x3) Op= e (a cosx + ca sinx) + ex (8x - 8x2 + 16x3)