Example 4.4.2 Solve following initial value ODEs a) def ty = t, y(0) = 1, dy (0) = -2 b) y" - 3y' + 2y = 4e2t, y(0) = -3. y'(0) = 5 c) y" + 2y' + by = e-'sint, y(0) = 0. y'(0) = 1