solve the control system course problem

Find the transfer function $\frac{Y(s)}{F(s)}$ of the following mechanical system.

Select one:

a$.\frac{Y(s)}{F(s)}=\frac{1}{m{s}^2+bs+2k}$

b$.\frac{Y(s)}{F(s)}=\frac{2}{m{s}^2+bs+k}$

c$.\frac{Y(s)}{F(s)}=\frac{1}{2m{s}^2+2bs+k}$

d$.\frac{Y(s)}{F(s)}=\frac{1}{m{s}^2+bs+k}$

e$.$ None of these