a) Find y as a function of x if

y''' - 9y'' + 20y' = 0 , y(0) = 7, y'(0) = 5 , y''(0) = 1

y(x) = ?

b) Find y as a function of x if

y^(4) - 10y''' + 25y'' = 0

y(0) = 9 , y'(0) = 1, y''(0) = 25 , y'''(0) = 0

y(x) = ?

Find y(x) for both questions.