Use Variation of Parameters to solve the differential equation. y" - 2y' + y = 4x 1/2ex Select one: a.y = c₁ex + c₂xex-(8/3) x 5/2 ex b. y c₁exc₂xex- (16/15) x5/2 ex c. y = c₁ex + c₂xex + (8/5) x5/2 ex d. y c₁ex + c₂xe* + (16/15)x5/2 ex e. y=c₁ex + c₂xex + (8/3)x5/2 ex