Solve 4-6 step by step please

4. [-/1 Points] DETAILS Find the Laplace Transform of the function f (t) = (9- ellt + 7e-it) cos (9 t) F (s ) = . symbolic formatting help Submit Answer 5. [-/2 Points] DETAILS Find the inverse Laplace Transform of the function 12s + 19 F (s) = $2 + 4s + 29 f ( t ) = *." symbolic formatting help Submit Answer 6. [-/2 Points] DETAILS Find the inverse Laplace trnsform of 33s2 + 70s + 1665 F (s) = (s - 1)2 ($2 + 25) f (t ) = * symbolic formatting help