In Problems 35-40 solve the given differential equation sub- ject to the indicated conditions. 35. y" - 2y' + 2y = 0, y (π/2) = 0, y(π) = -1 36. y" + 2y' + y = 0, y(-1) = 0, y'(0) = 0 37. y" - y = x + sin x, y(0) = 2, y'(0) = 3