Help please

4. Find the inverse Laplace transform. 2 + 3s 3s2 + 2s + 1 (a) ($2 + 1) (s + 2) (s + 1) (b) ( $2 + 1 ) ($2 + 28 + 2) 3s + 2 3s2 + 2s +1 (c) (d) ( s - 2) ( $2 + 2s + 5) ( s - 1) 2 ( s + 2) (s + 3 ) 252 + s + 3 3s + 2 (e) s - 1 2 ( s + 2)2 (f) ($2 + 1) (s - 1)2